7+3y=21

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Solution for 7+3y=21 equation: 



7+3y=21

We move all terms to the left:

7+3y-(21)=0

We add all the numbers together, and all the variables

3y-14=0

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

3y=14

y=14/3

y=4+2/3

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