42-3y=30

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Solution for 42-3y=30 equation: 



42-3y=30

We move all terms to the left:

42-3y-(30)=0

We add all the numbers together, and all the variables

-3y+12=0

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

-3y=-12

y=-12/-3

y=+4

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