71=4y-9

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Solution for 71=4y-9 equation: 



71=4y-9

We move all terms to the left:

71-(4y-9)=0

We get rid of parentheses

-4y+9+71=0

We add all the numbers together, and all the variables

-4y+80=0

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

-4y=-80

y=-80/-4

y=+20

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