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(3x+120)=(2x+130)
We move all terms to the left:
(3x+120)-((2x+130))=0
We get rid of parentheses
3x-((2x+130))+120=0
We calculate terms in parentheses: -((2x+130)), so:We get rid of parentheses
(2x+130)
We get rid of parentheses
2x+130
Back to the equation:
-(2x+130)
3x-2x-130+120=0
We add all the numbers together, and all the variables
x-10=0
We move all terms containing x to the left, all other terms to the right
x=10
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