Y=120-30x

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Solution for Y=120-30x equation: 



=120-30Y

We move all terms to the left:

-(120-30Y)=0

We add all the numbers together, and all the variables

-(-30Y+120)=0

We get rid of parentheses

30Y-120=0

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

30Y=120

Y=120/30

Y=4

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