4y=21+7

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Solution for 4y=21+7 equation: 



4y=21+7

We move all terms to the left:

4y-(21+7)=0

We add all the numbers together, and all the variables

4y-28=0

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

4y=28

y=28/4

y=7

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