Update README.md

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

Author: FabianaCampanari

README.md

@@ -1708,7 +1708,7 @@ v_1 &= 12, \quad v_2 = 18, \quad v_3 = 37
  Non-Basic Variable | Reduced Cost              | Value  |
 |--------------------|---------------------------|--------|
 |  $x_{12}$          | $0 + 18 - 22 = -4$        |  $-4$  |
-| \( x_{13} \)       | \( 0 + 37 - 30 = 7 \)     | \(7\)  |
+|  $x_{13}$          | $0 + 37 - 30 = 7$         |  $7$   |
 | \( x_{23} \)       | \( 6 + 37 - 32 = 11 \)    | \(11\) |
 | \( x_{31} \)       | \( -3 + 12 - 22 = -13 \)  | \(-13\)|