18y+21=57

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Solution for 18y+21=57 equation: 



18y+21=57

We move all terms to the left:

18y+21-(57)=0

We add all the numbers together, and all the variables

18y-36=0

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

18y=36

y=36/18

y=2

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