4y+5=9y+21

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Solution for 4y+5=9y+21 equation: 



4y+5=9y+21

We move all terms to the left:

4y+5-(9y+21)=0

We get rid of parentheses

4y-9y-21+5=0

We add all the numbers together, and all the variables

-5y-16=0

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

-5y=16

y=16/-5

y=-3+1/5

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