13=5+3(7)-13

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Solution for 13=5+3(7)-13 equation:


13=5+3(7)-13

We simplify the equation to the form, which is simple to understand 
13=5+3(7)-13

Reorder the terms in parentheses
13=5+(+21)-13

Remove unnecessary parentheses
+13=+5+21-13

We move all terms containing  to the left and all other terms to the right. 
0=+5+21-13-13

We simplify left and right side of the equation. 
0=0

0=0

This equation is an identity, so all real numbers are solutions.

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