Update README.md

Signed-off-by: Fabiana 🚀  Campanari <[email protected]>

Author: FabianaCampanari

README.md

@@ -645,6 +645,33 @@ $x_1,\ x_2,\ s_1,\ s_2,\ s_3,\ s_4 \geq 0$
 
 <br>
 
+```latex
+\
+\begin{aligned}
+\text{Max.} \quad & Z = 4x_1 + 3x_2 \\
+\text{S.a.} \quad & 
+\begin{cases}
+x_1 + 3x_2 + s_1 = 7 \\
+2x_1 + 2x_2 + s_2 = 8 \\
+x_1 + x_2 + s_3 = 3 \\
+x_2 + s_4 = 2 \\
+x_1,\, x_2,\, s_1,\, s_2,\, s_3,\, s_4 \geq 0
+\end{cases}
+\end{aligned}
+\
+```
+<br>
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