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

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


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

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

Remove unnecessary parentheses
-1-3a=3*(a+3)-7a

Reorder the terms in parentheses
-1-3a=+(+3a+9)-7a

Remove unnecessary parentheses
-1-3a=+3a+9-7a

We move all terms containing a to the left and all other terms to the right. 
-3a-3a+7a=+9+1

We simplify left and right side of the equation. 
+1a=+10

We divide both sides of the equation by 1 to get a. 
a=10

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