21y-6=57

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Solution for 21y-6=57 equation: 



21y-6=57

We move all terms to the left:

21y-6-(57)=0

We add all the numbers together, and all the variables

21y-63=0

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

21y=63

y=63/21

y=3

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