12-5y=21

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Solution for 12-5y=21 equation: 



12-5y=21

We move all terms to the left:

12-5y-(21)=0

We add all the numbers together, and all the variables

-5y-9=0

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

-5y=9

y=9/-5

y=-1+4/5

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