4y-9=12

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Solution for 4y-9=12 equation: 



4y-9=12

We move all terms to the left:

4y-9-(12)=0

We add all the numbers together, and all the variables

4y-21=0

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

4y=21

y=21/4

y=5+1/4

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