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(3x+100)=(x-4)
We move all terms to the left:
(3x+100)-((x-4))=0
We get rid of parentheses
3x-((x-4))+100=0
We calculate terms in parentheses: -((x-4)), so:We get rid of parentheses
(x-4)
We get rid of parentheses
x-4
Back to the equation:
-(x-4)
3x-x+4+100=0
We add all the numbers together, and all the variables
2x+104=0
We move all terms containing x to the left, all other terms to the right
2x=-104
x=-104/2
x=-52
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