9y-7y-18=15-y

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Solution for 9y-7y-18=15-y equation: 



9y-7y-18=15-y

We move all terms to the left:

9y-7y-18-(15-y)=0

We add all the numbers together, and all the variables

9y-7y-(-1y+15)-18=0

We add all the numbers together, and all the variables

2y-(-1y+15)-18=0

We get rid of parentheses

2y+1y-15-18=0

We add all the numbers together, and all the variables

3y-33=0

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

3y=33

y=33/3

y=11

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