3(28-3y)-9y=12

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Solution for 3(28-3y)-9y=12 equation: 



3(28-3y)-9y=12

We move all terms to the left:

3(28-3y)-9y-(12)=0

We add all the numbers together, and all the variables

3(-3y+28)-9y-12=0

We add all the numbers together, and all the variables

-9y+3(-3y+28)-12=0

We multiply parentheses

-9y-9y+84-12=0

We add all the numbers together, and all the variables

-18y+72=0

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

-18y=-72

y=-72/-18

y=+4

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