-3(1+a)-3a=-2(4+4a)-7

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Solution for -3(1+a)-3a=-2(4+4a)-7 equation:


-3(1+a)-3a=-2(4+4a)-7

We simplify the equation to the form, which is simple to understand 
-3(1+a)-3a=-2(4+4a)-7

Reorder the terms in parentheses
+(-3-3a)-3a=-2*(4+4a)-7

Remove unnecessary parentheses
-3-3a-3a=-2+*(+4+4a+)-7

Reorder the terms in parentheses
-3-3a-3a=+(-8-8a)-7

Remove unnecessary parentheses
-3-3a-3a=-8-8a-7

We move all terms containing a to the left and all other terms to the right. 
-3a-3a+8a=-8-7+3

We simplify left and right side of the equation. 
+2a=-12

We divide both sides of the equation by 2 to get a. 
a=-6

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