-7+20=y

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Solution for -7+20=y equation: 



-7+20=y

We move all terms to the left:

-7+20-(y)=0

We add all the numbers together, and all the variables

-1y+13=0

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

-y=-13

y=-13/-1

y=+13

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