3y-9=12y

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Solution for 3y-9=12y equation: 



3y-9=12y

We move all terms to the left:

3y-9-(12y)=0

We add all the numbers together, and all the variables

-9y-9=0

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

-9y=9

y=9/-9

y=-1

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