30=12y-7y

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Solution for 30=12y-7y equation: 



30=12y-7y

We move all terms to the left:

30-(12y-7y)=0

We add all the numbers together, and all the variables

-(+5y)+30=0

We get rid of parentheses

-5y+30=0

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

-5y=-30

y=-30/-5

y=+6

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