Y=21-2(10.5+-0.5y)

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Solution for Y=21-2(10.5+-0.5y) equation: 



=21-2(10.5+-0.5Y)

We move all terms to the left:

-(21-2(10.5+-0.5Y))=0

We add all the numbers together, and all the variables

-(21-2(-0.5Y))=0



We calculate terms in parentheses: -(21-2(-0.5Y)), so:

21-2(-0.5Y)

determiningTheFunctionDomain
-2(-0.5Y)+21

We multiply parentheses

-0Y+21

We add all the numbers together, and all the variables

-1Y+21

Back to the equation:

-(-1Y+21)



We get rid of parentheses

1Y-21=0

We add all the numbers together, and all the variables

Y-21=0

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

Y=21

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