3(4)+9y=21

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Solution for 3(4)+9y=21 equation: 



3(4)+9y=21

We move all terms to the left:

3(4)+9y-(21)=0

We add all the numbers together, and all the variables

9y+13=0

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

9y=-13

y=-13/9

y=-1+4/9

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