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7x-(x-4)=2(x-1)
We move all terms to the left:
7x-(x-4)-(2(x-1))=0
We get rid of parentheses
7x-x-(2(x-1))+4=0
We calculate terms in parentheses: -(2(x-1)), so:We add all the numbers together, and all the variables
2(x-1)
We multiply parentheses
2x-2
Back to the equation:
-(2x-2)
6x-(2x-2)+4=0
We get rid of parentheses
6x-2x+2+4=0
We add all the numbers together, and all the variables
4x+6=0
We move all terms containing x to the left, all other terms to the right
4x=-6
x=-6/4
x=-1+1/2
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