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-2(2+7a)+5a=-8a
We move all terms to the left:
-2(2+7a)+5a-(-8a)=0
We add all the numbers together, and all the variables
-2(7a+2)+5a-(-8a)=0
We add all the numbers together, and all the variables
5a-2(7a+2)-(-8a)=0
We multiply parentheses
5a-14a-(-8a)-4=0
We get rid of parentheses
5a-14a+8a-4=0
We add all the numbers together, and all the variables
-1a-4=0
We move all terms containing a to the left, all other terms to the right
-a=4
a=4/-1
a=-4
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