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-7x+4(x-4)=-37
We move all terms to the left:
-7x+4(x-4)-(-37)=0
We add all the numbers together, and all the variables
-7x+4(x-4)+37=0
We multiply parentheses
-7x+4x-16+37=0
We add all the numbers together, and all the variables
-3x+21=0
We move all terms containing x to the left, all other terms to the right
-3x=-21
x=-21/-3
x=+7
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