Y-9=-3(x-9)

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Solution for Y-9=-3(x-9) equation: 



-9=-3(Y-9)

We move all terms to the left:

-9-(-3(Y-9))=0



We calculate terms in parentheses: -(-3(Y-9)), so:

-3(Y-9)

We multiply parentheses

-3Y+27

Back to the equation:

-(-3Y+27)



We get rid of parentheses

3Y-27-9=0

We add all the numbers together, and all the variables

3Y-36=0

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

3Y=36

Y=36/3

Y=12

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