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8(-2a-4)+12=-52
We move all terms to the left:
8(-2a-4)+12-(-52)=0
We add all the numbers together, and all the variables
8(-2a-4)+64=0
We multiply parentheses
-16a-32+64=0
We add all the numbers together, and all the variables
-16a+32=0
We move all terms containing a to the left, all other terms to the right
-16a=-32
a=-32/-16
a=+2
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