4y-9=12y+31

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Solution for 4y-9=12y+31 equation: 



4y-9=12y+31

We move all terms to the left:

4y-9-(12y+31)=0

We get rid of parentheses

4y-12y-31-9=0

We add all the numbers together, and all the variables

-8y-40=0

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

-8y=40

y=40/-8

y=-5

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