3y-9=15y+99

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Solution for 3y-9=15y+99 equation: 



3y-9=15y+99

We move all terms to the left:

3y-9-(15y+99)=0

We get rid of parentheses

3y-15y-99-9=0

We add all the numbers together, and all the variables

-12y-108=0

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

-12y=108

y=108/-12

y=-9

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