21-16=18y-9

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Solution for 21-16=18y-9 equation: 



21-16=18y-9

We move all terms to the left:

21-16-(18y-9)=0

We add all the numbers together, and all the variables

-(18y-9)+5=0

We get rid of parentheses

-18y+9+5=0

We add all the numbers together, and all the variables

-18y+14=0

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

-18y=-14

y=-14/-18

y=7/9

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