-7=-3-y

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Solution for -7=-3-y equation: 



-7=-3-y

We move all terms to the left:

-7-(-3-y)=0

We add all the numbers together, and all the variables

-(-1y-3)-7=0

We get rid of parentheses

1y+3-7=0

We add all the numbers together, and all the variables

y-4=0

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

y=4

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