180=y+(y-30)+90

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Solution for 180=y+(y-30)+90 equation: 



180=y+(y-30)+90

We move all terms to the left:

180-(y+(y-30)+90)=0



We calculate terms in parentheses: -(y+(y-30)+90), so:

y+(y-30)+90

We get rid of parentheses

y+y-30+90

We add all the numbers together, and all the variables

2y+60

Back to the equation:

-(2y+60)



We get rid of parentheses

-2y-60+180=0

We add all the numbers together, and all the variables

-2y+120=0

We move all terms containing y to the left, all other terms to the right

-2y=-120

y=-120/-2

y=+60

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