21y=9+24y

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Solution for 21y=9+24y equation: 



21y=9+24y

We move all terms to the left:

21y-(9+24y)=0

We add all the numbers together, and all the variables

21y-(24y+9)=0

We get rid of parentheses

21y-24y-9=0

We add all the numbers together, and all the variables

-3y-9=0

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

-3y=9

y=9/-3

y=-3

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