31=7(3)+2y

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Solution for 31=7(3)+2y equation: 



31=7(3)+2y

We move all terms to the left:

31-(7(3)+2y)=0

We add all the numbers together, and all the variables

-(2y+73)+31=0

We get rid of parentheses

-2y-73+31=0

We add all the numbers together, and all the variables

-2y-42=0

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

-2y=42

y=42/-2

y=-21

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