3y-21=69

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Solution for 3y-21=69 equation: 



3y-21=69

We move all terms to the left:

3y-21-(69)=0

We add all the numbers together, and all the variables

3y-90=0

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

3y=90

y=90/3

y=30

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