13*3=y-9

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Solution for 13*3=y-9 equation: 



13*3=y-9

We move all terms to the left:

13*3-(y-9)=0

We add all the numbers together, and all the variables

-(y-9)+39=0

We get rid of parentheses

-y+9+39=0

We add all the numbers together, and all the variables

-1y+48=0

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

-y=-48

y=-48/-1

y=+48

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