21-4y=y

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Solution for 21-4y=y equation: 



21-4y=y

We move all terms to the left:

21-4y-(y)=0

We add all the numbers together, and all the variables

-5y+21=0

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

-5y=-21

y=-21/-5

y=4+1/5

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