20-3y=-1

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Solution for 20-3y=-1 equation: 



20-3y=-1

We move all terms to the left:

20-3y-(-1)=0

We add all the numbers together, and all the variables

-3y+21=0

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

-3y=-21

y=-21/-3

y=+7

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