-a+3a=15+a+1-7a

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Solution for -a+3a=15+a+1-7a equation:


-a+3a=15+a+1-7a

We simplify the equation to the form, which is simple to understand 
-a+3a=15+a+1-7a

We move all terms containing a to the left and all other terms to the right. 
-1a+3a-1a+7a=+15+1

We simplify left and right side of the equation. 
+8a=+16

We divide both sides of the equation by 8 to get a. 
a=2

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