7+3-12=y-9

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Solution for 7+3-12=y-9 equation: 



7+3-12=y-9

We move all terms to the left:

7+3-12-(y-9)=0

We add all the numbers together, and all the variables

-(y-9)-2=0

We get rid of parentheses

-y+9-2=0

We add all the numbers together, and all the variables

-1y+7=0

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

-y=-7

y=-7/-1

y=+7

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