Mark bought a shirt, pants, and shoes for $340. What is the price of the pants knowing that the price of a shirt is three-quarters of the price of the pants and that the price of a shoe is ten dollars more than the price of the pants? Let's be accurate as possible.
Let X be the price of the pants. The price of the shirt is 3 / 4 * X. The price of the shoes is X + 10. The total amount paid is X + 3 / 4 * X + X + 10 = $340. Combining like terms we get X * 11 / 4 + 10 = $340. Subtracting 10 from both sides we get X * 11 / 4 = $330. Dividing both sides by 11 / 4 we get X = $120.
The answer: 120.