2y+3=21-4y

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Solution for 2y+3=21-4y equation: 



2y+3=21-4y

We move all terms to the left:

2y+3-(21-4y)=0

We add all the numbers together, and all the variables

2y-(-4y+21)+3=0

We get rid of parentheses

2y+4y-21+3=0

We add all the numbers together, and all the variables

6y-18=0

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

6y=18

y=18/6

y=3

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