40=12y-7y

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Solution for 40=12y-7y equation: 



40=12y-7y

We move all terms to the left:

40-(12y-7y)=0

We add all the numbers together, and all the variables

-(+5y)+40=0

We get rid of parentheses

-5y+40=0

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

-5y=-40

y=-40/-5

y=+8

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