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80=(2x+30)
We move all terms to the left:
80-((2x+30))=0
We calculate terms in parentheses: -((2x+30)), so:We get rid of parentheses
(2x+30)
We get rid of parentheses
2x+30
Back to the equation:
-(2x+30)
-2x-30+80=0
We add all the numbers together, and all the variables
-2x+50=0
We move all terms containing x to the left, all other terms to the right
-2x=-50
x=-50/-2
x=+25
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