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x=(4x-40)
We move all terms to the left:
x-((4x-40))=0
We calculate terms in parentheses: -((4x-40)), so:We get rid of parentheses
(4x-40)
We get rid of parentheses
4x-40
Back to the equation:
-(4x-40)
x-4x+40=0
We add all the numbers together, and all the variables
-3x+40=0
We move all terms containing x to the left, all other terms to the right
-3x=-40
x=-40/-3
x=13+1/3
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