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7x-4(x+2)=-85
We move all terms to the left:
7x-4(x+2)-(-85)=0
We add all the numbers together, and all the variables
7x-4(x+2)+85=0
We multiply parentheses
7x-4x-8+85=0
We add all the numbers together, and all the variables
3x+77=0
We move all terms containing x to the left, all other terms to the right
3x=-77
x=-77/3
x=-25+2/3
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