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5x=(x+54)=90
We move all terms to the left:
5x-((x+54))=0
We calculate terms in parentheses: -((x+54)), so:We get rid of parentheses
(x+54)
We get rid of parentheses
x+54
Back to the equation:
-(x+54)
5x-x-54=0
We add all the numbers together, and all the variables
4x-54=0
We move all terms containing x to the left, all other terms to the right
4x=54
x=54/4
x=13+1/2
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