21. Solve 0 = p - 2*r - 4, 0*p + k*p + r - 20 = 0 for p.
4
Suppose -6*k + 32 = 14. Solve -23 = -2*f + 5*j, -5*f - 17 - k = 3*j for f.
-1
Let z = 29 - 14. Suppose 10*m = 5*m + z. Solve -5*v + 25 = b, m*v - 5*v - 3*b = -23 for v.
4
Let m be (-4)/6*1*-3. Solve 3*i - 17 = -5*j, -j + m = 3*i - 11 for j.
1
Let u = 33 + -47. Let c be (-2)/(-3) - u/(-21). Let z = c - -2. Solve -y = -z*g + 9, g - 5*y - 15 = -y for g.
3
Suppose 9 + 11 = 4*i, 4*r = 4*i - 12. Let n(b) = -5*b. Let z be n(0). Solve z = -d - r, -2 = -3*y - 2*y + d for y.
0
Let h(k) = -k**2. Let a(w) = -2*w**2 - 4*w - 3. Let c(r) = -a(r) + h(r). Let y be c(-4). Solve -z - 4*z = -x - 20, -y*z = 3*x - 30 for z.
5
Let n = 26 - 26. Let v(q) = -q**3 - q**2 - 2*q + 13. Let a be v(n). Solve 0 = -l + 3*d - a, -d - d + 8 = 0 for l.
-1
Let n(w) = 4*w + 1. Let c be n(3). Let j = c + -8. Let x = -11 + 16. Solve 0 = j*r - 3*f - 25, 8 + 17 = x*r + 3*f for r.
5
Let k = 9 - 2. Let j = 0 + k. Solve -4*y + 31 = 2*q + q, -j = -3*y + q for y.
4
Suppose 0 = 2*s - h - 23, 0*s - s - 4*h = 2. Solve f - 3 = 0, 0 = -0*m + m - 4*f + s for m.
2
Let t = 3 - -1. Let m be (6/2)/1 + 3. Suppose 2*f + 0*f - m = 0. Solve 0*i = 2*i - 5*p - 25, 3*i = -t*p + f for i.
5
Let j = 2 - -1. Solve 4*q = -j*t + 3*q - 4, 2*q - 1 = 3*t for t.
-1
Suppose 107 = 5*q + 3*b, b = -4*q - b + 84. Let v = 14 - 9. Solve -p + 3*g - q = -0*p, -2*g + 30 = -v*p for p.
-4
Suppose -2*y + 7 = b, -b + 5*b = -4*y + 24. Let q be (20/7)/((-4)/(-14)). Solve -b*j = q, -2*j + j = -5*z - 3 for z.
-1
Let v = -6 - -9. Let a = 3 - 3. Solve a = -2*k + w + w - 6, 5*w - v = 2*k for k.
-4
Let m(d) = -d**2 + 9*d - 6. Let k be m(8). Suppose 0 = -3*w + 10 + k. Solve -2*c + 16 = 2*x + c, -w*c = -8 for x.
5
Let v(u) = -26*u - 11. Let c(o) = -5*o - 2. Let w(y) = 11*c(y) - 2*v(y). Let r be w(-2). Let i = -5 + r. Solve 5*m - 3*f - 11 + i = 0, f + 15 = 4*m for m.
5
Suppose -4*h - h - 5*y = -20, 4*y = 5*h + 25. Let u = 1 - h. Let r be 1 + 2/(3 - 1). Solve -2*g = -2*c + g + 3, 0 = r*g - u for c.
3
Let j(b) = -2*b**2 + 11*b - 2. Let g = 13 + -8. Let o be j(g). Solve -4*h + 12 = 5*m, 2*m + o*h + 14 = 4*m for m.
4
Let r(c) be the second derivative of c**5/20 - c**4/12 + 3*c**2/2 + c. Let h be r(0). Suppose 5*d - 19 = 6. Solve 5*p = d*j - j + h, -2*j - 6 = 2*p for j.
-2
Let k(n) be the second derivative of n**3/6 + 9*n**2/2 - 2*n. Let z be k(-6). Let h = -3 + z. Solve h = -3*r - w + 4, -r - 2*w + 0*w = -3 for r.
1
Let w(d) = -21*d**3 - 1. Let a be w(-1). Solve -2*c - a = -3*x + 5*x, 5*x = -25 for c.
-5
Let x be (0 + (0 - -5))*3. Suppose -5*h + 0*h + x = 0. Solve 0 = 2*g + 2*g - 5*b - 25, h*b = -3 for g.
5
Let a(r) = -r**2 + 3. Let o be a(0). Let v = 15 + -21. Let y = 9 + v. Solve z + 3*u + 12 = 0, 7*z - 12 = o*z + y*u for z.
0
Let r be ((-4)/(-12)*(2 - 2))/2. Solve -2*b + 3*k + 5 = -3, r = b - k - 4 for b.
4
Let w(s) = -s**3 - 15*s**2 + 5. Let a be w(-15). Solve -10 = 5*o + 3*p, a*p - 20 = 5 for o.
-5
Let y = -6 + 4. Let c be 2 + -1*(y + 3). Solve 5 + c = -3*x, -3*x = -l + 2 for l.
-4
Let q = 9 - 6. Let z = q + 0. Solve 3*v - 5*a = -25, v + 3*a = z - 2 for v.
-5
Let l be ((-18)/(-27))/(2/9). Solve 5*v - 4*f + 2*f - 9 = 0, l = -3*v + 4*f for v.
3
Let z be 10/(-15)*(-30)/4. Let q(o) = 1 - 4 + 3*o + 4. Let t be q(z). Solve -2*w + 4*p = -w - 12, -3*w = -2*p - t for w.
4
Let t = -1 - -4. Suppose -o = q + 3, 9 - 2 = -3*o - 4*q. Let y(r) = r + 6. Let u be y(o). Solve -4*f - 2*v + 6 = 0, t*v + 11 + u = f for f.
3
Let w be (-12)/30 - (-14)/10. Suppose 4*j + w = 5. Solve -k = -l - j, -2*l - k = -4*k for l.
-3
Let y be (-218)/(-14) + (-15)/(-35). Solve -2*k + 8 = -4*o, -2*o + 2*k - y = -2*k for o.
0
Let b(w) = -w**3 - 3*w**2 + 6*w + 10. Let j be b(-4). Solve 0 = r - 5*l - 24, 0 = -3*r + j*l - 6*l - 23 for r.
-1
Let b be 3/(-2)*(-7 - -5). Suppose 1 = -b*k + 16. Solve -2*m + 18 = 2*x, -2*m - 33 = -4*m - k*x for m.
4
Suppose -3*o + 6 = 5*r + 1, -3 = -2*o - 3*r. Solve 13 = 3*a + 5*d + 4, 4*d = o for a.
3
Let h = 4 - -8. Let v be 56/h + (-4)/6. Solve -2*u + u + 1 = -j, 0 = v*u - 2*j - 2 for u.
0
Suppose -4 - 5 = -2*m + a, 0 = 2*m - 4*a - 24. Solve -29 = 5*c + 3*y, y + 19 = -m*c - 2*c for c.
-4
Let m(w) = w - 15. Let o = 14 - -5. Let j be m(o). Solve 4*z + r - 23 = 0, -4*r - 12 + 4 = -j*z for z.
5
Suppose z + 2*z = 6. Suppose -2*q - z = -3*q. Suppose q*r + k = -0*r + 38, -r = -4*k - 37. Solve -4*g - r = n, 2 = 3*n - 4*g + 1 for n.
-5
Let d(g) be the first derivative of 2*g**3/3 - g**2 - g - 3. Let j be d(2). Solve -4*h - j*w - 7 = 0, h - 3*h + 4*w + 24 = 0 for h.
2
Let f(q) = q**3 + 7. Let a be f(0). Suppose u = 2*u - a. Solve t = -3*r - u, -3*r - 2*t = -4*r - 7 for r.
-3
Suppose 0 = 5*c - 6 - 29. Suppose 0 = -3*w - 4*l + 26 - c, 0 = -3*w - l + 16. Solve -w*d = -0*k + 3*k + 31, 3*k = -2*d - 16 for k.
-2
Let m be 3/((-4)/(-8) + 1) + 1. Solve -3*n = -q + 5, -2*q + 3*n = -5*q + m for q.
2
Let k(v) = -4*v - 35. Let f be k(-10). Solve 3*z + 11 = -0*p - 2*p, -f*z - p = 16 for z.
-3
Suppose 4*n - n - 6 = 0. Solve -5*h + 15 = -10*h + 3*m, 0 = -2*h + n*m - 10 for h.
0
Let v = 7 + -4. Suppose -5*i + v*y + 19 = 0, i - y - 3 = -0*y. Solve -3*g = -5*m - 27, -3 = -i*m - 18 for g.
4
Let w(z) = -z. Let j be w(-3). Let b = -3 + j. Solve b = 5*y - 2*a + 17, 2*a - 5 - 2 = 3*y for y.
-5
Let i be 0 + 51/9 - (-2)/6. Solve -4*r = 3*o - i*o - 3, -3*r + 4*o + 4 = 0 for r.
0
Let p(g) = g - 1. Let j be p(-3). Suppose -5*o - 28 = 2. Let d = j - o. Solve 4*q - 5*n - 3 = 22, d*n + 10 = -4*q for q.
0
Let m be 8 - -1*(-6)/(-2). Suppose 0 = c + 4*u - 14, -2*c + 5 + 19 = 4*u. Let d = c + -5. Solve -4*p - m = d*y, -4*y + 9 = -p + 1 for y.
1
Let x(w) = 3*w - 1. Let p be x(1). Let z be 40/(-12)*6/(-4). Suppose 2*y + 34 = z*s, 29 = 5*s - 5*y + 4. Solve p*a = -5*d + 3, -a - s = -2*a + 4*d for a.
4
Suppose 0*p - p + 2 = 0. Solve -p*i = 8, -i + 28 = -5*t - 3*i for t.
-4
Suppose -2*a + 0*a = -m + 16, 74 = 5*m - 4*a. Suppose p - 3*p + m = 0. Solve f - 13 = -3*w, w = -2*w + 4*f - p for w.
3
Suppose 2*b + 4*p = 11 - 3, -2*b = -5*p - 8. Solve -4*t + b*f - 12 = 0, 4 = -0*f + f for t.
1
Suppose -11*t = -10*t - 2. Solve -10 = -4*x - 5*s, -4*x = -t*s - 0*s - 24 for x.
5
Suppose -u + 15 = 4*u. Let z(g) = -g + 7. Let h be z(3). Solve h*w = 5*p - 7, 2*w + 5*p + 2 = u*w for w.
-3
Let j be -5*2*2/(-10). Let i(b) = -b - b**3 - 2*b**2 + 7*b - 8*b + 4*b**3. Let c be i(j). Solve -w - y = y - 8, 4*y = c for w.
2
Suppose 0 = y - 2*y, -f + 4*y + 3 = 0. Solve 3*d = f, -4*m - 2*d - 10 = -4 for m.
-2
Let i = -4 - -7. Solve -u = -i*d + 20, -5*d + 5*u = -8 - 42 for d.
5
Suppose -3*x + 0 - 20 = -4*f, 0 = -5*x + 2*f - 10. Solve -2*q + 12 = -2*h + 3*q, x = -5*h - 2*q + 28 for h.
4
Suppose -3*q = q - 12. Suppose -5*z - 32 = -z. Let b be (-26)/z + q/(-12). Solve b*h = 5*g - 2*g + 9, 5*g = -5*h - 35 for h.
-2
Suppose 0 = -4*h + 50 - 2. Solve -5*k - h - 2 = -2*l, -l + k + 1 = 0 for l.
-3
Let i = -47 + 52. Solve i*p - 4 = -4*l, -p + 0*p = 4*l - 4 for p.
0
Let m = 32 + -27. Solve -3 = a + m*j - 3*j, 5*a = 5*j + 15 for a.
1
Suppose -6*l = -5*l - 12. Solve 2*b - 6 = 4*b + 2*r, -r + l = -2*b for b.
-5
Suppose -4*g + 14 = -2*h, -g - 3*h - 8 = -1. Let r be -5*9/(-30)*g. Solve -i - r*f = -2*f - 1, 3*f + 21 = 3*i for i.
4
Suppose 30 = 5*w - 3*l, -37 = -5*w + w + 5*l. Suppose -3*q - 16 = -2*o, 20 + 12 = 4*o - w*q. Solve -18 = -4*n - 2*g, -n + 3*g + 0*g + o = 0 for n.
5
Let g be (-5 + -1)/((-3)/2). Let p = -2 - -4. Suppose 0 = 5*x - g*r - 6, -2*x - p*x - r = -9. Solve d + 0 = -2*y + 14, 2*y = x*d + 2 for d.
4
Let r be 3/(-2*2/20). Let l be (-1)/5 + (-63)/r. Solve -2*j - 2*u = -7*u, -4*u = -l*j for j.
0
Let r(c) = -c**2 + 11*c - 3. Let v be r(8). Solve i = -4*x - v, -14 = x + i + i for x.
-4
Let s(g) = g**3 - 11*g**2 - g + 10. Let h be s(11). Let m = h - -7. Let v = 0 - 0. Solve v = w + k + 4, 4*w + 1 = -k - m for w.
-1
Let y(k) = k**2 - 8*k + 3. Let c be y(7). Let i = c + 6. Let t = 0 + i. Solve 4 = -t*l + 2*u, 3*l + 0*l - 4*u + 11 = 0 for l.
3
Let g(z) = z**3 - 5*z**2 + 2*z - 5. Let q be g(5). Solve 2*d = -3*d + 3*x, q*x = 0 for d.
0
Suppose 5*w - c - 22 = 11, 9 = 2*w + c. Suppose -2*l = -10 + w. Solve x = -4, -4*n - 4 = -x - l*x for n.
-4
Let k = 0 - -1. Suppose -2*b = -5*g + 16, b - 3*g + 4 + 6 = 0. Solve t = -5*a - 15, b*t - 5 = 2*a + k for t.
0
Suppose 2*l = -3*l + 5. Let q b