21y-1=3

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Solution for 21y-1=3 equation: 



21y-1=3

We move all terms to the left:

21y-1-(3)=0

We add all the numbers together, and all the variables

21y-4=0

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

21y=4

y=4/21

y=4/21

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