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-8a+5(7+4a)=0
We add all the numbers together, and all the variables
-8a+5(4a+7)=0
We multiply parentheses
-8a+20a+35=0
We add all the numbers together, and all the variables
12a+35=0
We move all terms containing a to the left, all other terms to the right
12a=-35
a=-35/12
a=-2+11/12
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