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(x+50)=(2x-20)
We move all terms to the left:
(x+50)-((2x-20))=0
We get rid of parentheses
x-((2x-20))+50=0
We calculate terms in parentheses: -((2x-20)), so:We get rid of parentheses
(2x-20)
We get rid of parentheses
2x-20
Back to the equation:
-(2x-20)
x-2x+20+50=0
We add all the numbers together, and all the variables
-1x+70=0
We move all terms containing x to the left, all other terms to the right
-x=-70
x=-70/-1
x=+70
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