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42=1x-4(1x-1)
We move all terms to the left:
42-(1x-4(1x-1))=0
We add all the numbers together, and all the variables
-(1x-4(x-1))+42=0
We calculate terms in parentheses: -(1x-4(x-1)), so:We get rid of parentheses
1x-4(x-1)
We add all the numbers together, and all the variables
x-4(x-1)
We multiply parentheses
x-4x+4
We add all the numbers together, and all the variables
-3x+4
Back to the equation:
-(-3x+4)
3x-4+42=0
We add all the numbers together, and all the variables
3x+38=0
We move all terms containing x to the left, all other terms to the right
3x=-38
x=-38/3
x=-12+2/3
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