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-7x+4(x+1)=-12-x
We move all terms to the left:
-7x+4(x+1)-(-12-x)=0
We add all the numbers together, and all the variables
-7x+4(x+1)-(-1x-12)=0
We multiply parentheses
-7x+4x-(-1x-12)+4=0
We get rid of parentheses
-7x+4x+1x+12+4=0
We add all the numbers together, and all the variables
-2x+16=0
We move all terms containing x to the left, all other terms to the right
-2x=-16
x=-16/-2
x=+8
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