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180=(50x+20)+(100x-80)
We move all terms to the left:
180-((50x+20)+(100x-80))=0
We calculate terms in parentheses: -((50x+20)+(100x-80)), so:We get rid of parentheses
(50x+20)+(100x-80)
We get rid of parentheses
50x+100x+20-80
We add all the numbers together, and all the variables
150x-60
Back to the equation:
-(150x-60)
-150x+60+180=0
We add all the numbers together, and all the variables
-150x+240=0
We move all terms containing x to the left, all other terms to the right
-150x=-240
x=-240/-150
x=1+3/5
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