9=3(-y-10)

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Solution for 9=3(-y-10) equation: 



9=3(-y-10)

We move all terms to the left:

9-(3(-y-10))=0

We add all the numbers together, and all the variables

-(3(-1y-10))+9=0



We calculate terms in parentheses: -(3(-1y-10)), so:

3(-1y-10)

We multiply parentheses

-3y-30

Back to the equation:

-(-3y-30)



We get rid of parentheses

3y+30+9=0

We add all the numbers together, and all the variables

3y+39=0

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

3y=-39

y=-39/3

y=-13

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