7=4-y

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Solution for 7=4-y equation: 



7=4-y

We move all terms to the left:

7-(4-y)=0

We add all the numbers together, and all the variables

-(-1y+4)+7=0

We get rid of parentheses

1y-4+7=0

We add all the numbers together, and all the variables

y+3=0

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

y=-3

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