9-20=3y-8-4y

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Solution for 9-20=3y-8-4y equation: 



9-20=3y-8-4y

We move all terms to the left:

9-20-(3y-8-4y)=0

We add all the numbers together, and all the variables

-(-1y-8)+9-20=0

We add all the numbers together, and all the variables

-(-1y-8)-11=0

We get rid of parentheses

1y+8-11=0

We add all the numbers together, and all the variables

y-3=0

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

y=3

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