Update README.md

Signed-off-by: Fabiana  ⚡️ Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -2036,9 +2036,9 @@ v_1 &= 12, \quad v_2 = 18, \quad v_3 = 24 \\
 | Non-Basic Variable | Reduced Cost                | Value  |
 |--------------------|-----------------------------|--------|
 | $x_{12}$           | $0 + 18 - 22 = -4$          | $-4$   |
-| $ x_{13} $         | $ 0 + 24 - 30 = -6 $        | $-6$   |
-| $ x_{23} $         | $ 6 + 24 - 32 = -2 $        | $-2$   |
-| $ x_{32} $         | $ 10 + 18 - 15 = 13 $       | $13$   |
+| $x_{13}$           | $0 + 24 - 30 = -6$          | $-6$   |
+| $x_{23}$           | $6 + 24 - 32 = -2$          | $-2$   |
+| $x_{32}$           | $10 + 18 - 15 = 13$         | $13$   |
 
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