71=8-7y

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Solution for 71=8-7y equation: 



71=8-7y

We move all terms to the left:

71-(8-7y)=0

We add all the numbers together, and all the variables

-(-7y+8)+71=0

We get rid of parentheses

7y-8+71=0

We add all the numbers together, and all the variables

7y+63=0

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

7y=-63

y=-63/7

y=-9

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