(3y-9)+(y+12)=180

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Solution for (3y-9)+(y+12)=180 equation: 



(3y-9)+(y+12)=180

We move all terms to the left:

(3y-9)+(y+12)-(180)=0

We get rid of parentheses

3y+y-9+12-180=0

We add all the numbers together, and all the variables

4y-177=0

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

4y=177

y=177/4

y=44+1/4

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