Y=(15-3x)

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Solution for Y=(15-3x) equation: 



=(15-3Y)

We move all terms to the left:

-((15-3Y))=0

We add all the numbers together, and all the variables

-((-3Y+15))=0



We calculate terms in parentheses: -((-3Y+15)), so:

(-3Y+15)

We get rid of parentheses

-3Y+15

Back to the equation:

-(-3Y+15)



We get rid of parentheses

3Y-15=0

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

3Y=15

Y=15/3

Y=5

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