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180=2x+(x+30)
We move all terms to the left:
180-(2x+(x+30))=0
We calculate terms in parentheses: -(2x+(x+30)), so:We get rid of parentheses
2x+(x+30)
We get rid of parentheses
2x+x+30
We add all the numbers together, and all the variables
3x+30
Back to the equation:
-(3x+30)
-3x-30+180=0
We add all the numbers together, and all the variables
-3x+150=0
We move all terms containing x to the left, all other terms to the right
-3x=-150
x=-150/-3
x=+50
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