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-4(2x+7)=9
We move all terms to the left:
-4(2x+7)-(9)=0
We multiply parentheses
-8x-28-9=0
We add all the numbers together, and all the variables
-8x-37=0
We move all terms containing x to the left, all other terms to the right
-8x=37
x=37/-8
x=-4+5/8
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