(4.5y-12)=9

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Solution for (4.5y-12)=9 equation: 



(4.5y-12)=9

We move all terms to the left:

(4.5y-12)-(9)=0

We get rid of parentheses

4.5y-12-9=0

We add all the numbers together, and all the variables

4.5y-21=0

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

4.5y=21

y=21/4.5

y=4+3/4.5

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