81-y=6y+4=8y-18

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Solution for 81-y=6y+4=8y-18 equation: 



81-y=6y+4=8y-18

We move all terms to the left:

81-y-(6y+4)=0

We add all the numbers together, and all the variables

-1y-(6y+4)+81=0

We get rid of parentheses

-1y-6y-4+81=0

We add all the numbers together, and all the variables

-7y+77=0

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

-7y=-77

y=-77/-7

y=+11

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