13=-7+y

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Solution for 13=-7+y equation: 



13=-7+y

We move all terms to the left:

13-(-7+y)=0

We add all the numbers together, and all the variables

-(y-7)+13=0

We get rid of parentheses

-y+7+13=0

We add all the numbers together, and all the variables

-1y+20=0

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

-y=-20

y=-20/-1

y=+20

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