2y+3y-4=21

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



2y+3y-4=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

5y-25=0

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

5y=25

y=25/5

y=5

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