9y=7y-180

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Solution for 9y=7y-180 equation: 



9y=7y-180

We move all terms to the left:

9y-(7y-180)=0

We get rid of parentheses

9y-7y+180=0

We add all the numbers together, and all the variables

2y+180=0

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

2y=-180

y=-180/2

y=-90

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