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-8a+36=4(7-4a)
We move all terms to the left:
-8a+36-(4(7-4a))=0
We add all the numbers together, and all the variables
-8a-(4(-4a+7))+36=0
We calculate terms in parentheses: -(4(-4a+7)), so:We get rid of parentheses
4(-4a+7)
We multiply parentheses
-16a+28
Back to the equation:
-(-16a+28)
-8a+16a-28+36=0
We add all the numbers together, and all the variables
8a+8=0
We move all terms containing a to the left, all other terms to the right
8a=-8
a=-8/8
a=-1
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