30-21y=20

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Solution for 30-21y=20 equation: 



30-21y=20

We move all terms to the left:

30-21y-(20)=0

We add all the numbers together, and all the variables

-21y+10=0

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

-21y=-10

y=-10/-21

y=10/21

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