Update README.md

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

Author: FabianaCampanari

README.md

@@ -188,9 +188,9 @@ The **graphical method** for solving simple linear programming (LP) problems inv
 
 ### [Key Concepts]():
 
-- **Decision Variables:** These are the variables that we want to determine the values of to optimize the ***[OBJECTIVE FUNCTION]()*** (e.g.) -
+- **Decision Variables:** These are the variables that we want to determine the values of to optimize the ***[OBJECTIVE FUNCTION]()*** (e.g.):
 
- #### $$\(x_1\)$$ and $$\(x_2\)$$
+   #### $$\(x_1\)$$ and $$\(x_2\)$$
 
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