40=7y-12y

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Solution for 40=7y-12y equation: 



40=7y-12y

We move all terms to the left:

40-(7y-12y)=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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