7(a-3)-4=-81

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Solution for 7(a-3)-4=-81 equation:


7(a-3)-4=-81

We simplify the equation to the form, which is simple to understand 
7(a-3)-4=-81

Reorder the terms in parentheses
+(+7a-21)-4=-81

Remove unnecessary parentheses
+7a-21-4=-81

We move all terms containing a to the left and all other terms to the right. 
+7a=-81+21+4

We simplify left and right side of the equation. 
+7a=-56

We divide both sides of the equation by 7 to get a. 
a=-8

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