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-4(2x+7)=28
We move all terms to the left:
-4(2x+7)-(28)=0
We multiply parentheses
-8x-28-28=0
We add all the numbers together, and all the variables
-8x-56=0
We move all terms containing x to the left, all other terms to the right
-8x=56
x=56/-8
x=-7
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