3y-21=4

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Solution for 3y-21=4 equation: 



3y-21=4

We move all terms to the left:

3y-21-(4)=0

We add all the numbers together, and all the variables

3y-25=0

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

3y=25

y=25/3

y=8+1/3

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