4y+2y=21

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Solution for 4y+2y=21 equation: 



4y+2y=21

We move all terms to the left:

4y+2y-(21)=0

We add all the numbers together, and all the variables

6y-21=0

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

6y=21

y=21/6

y=3+1/2

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