90-20=3.5y

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Solution for 90-20=3.5y equation: 



90-20=3.5y

We move all terms to the left:

90-20-(3.5y)=0

We add all the numbers together, and all the variables

-(+3.5y)+90-20=0

We add all the numbers together, and all the variables

-(+3.5y)+70=0

We get rid of parentheses

-3.5y+70=0

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

-3.5y=-70

y=-70/-3.5

y=+20

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