3(a+3)=-12

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Solution for 3(a+3)=-12 equation:


3(a+3)=-12

We simplify the equation to the form, which is simple to understand 
3(a+3)=-12

Reorder the terms in parentheses
+(+3a+9)=-12

Remove unnecessary parentheses
+3a+9=-12

We move all terms containing a to the left and all other terms to the right. 
+3a=-12-9

We simplify left and right side of the equation. 
+3a=-21

We divide both sides of the equation by 3 to get a. 
a=-7

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