-3(-7a-8)=87

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Solution for -3(-7a-8)=87 equation:


-3(-7a-8)=87

We simplify the equation to the form, which is simple to understand 
-3(-7a-8)=87

Reorder the terms in parentheses
+(+21a+24)=87

Remove unnecessary parentheses
+21a+24=+87

We move all terms containing a to the left and all other terms to the right. 
+21a=+87-24

We simplify left and right side of the equation. 
+21a=+63

We divide both sides of the equation by 21 to get a. 
a=3

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