23=-3(21-y)

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Solution for 23=-3(21-y) equation: 



23=-3(21-y)

We move all terms to the left:

23-(-3(21-y))=0

We add all the numbers together, and all the variables

-(-3(-1y+21))+23=0



We calculate terms in parentheses: -(-3(-1y+21)), so:

-3(-1y+21)

We multiply parentheses

3y-63

Back to the equation:

-(3y-63)



We get rid of parentheses

-3y+63+23=0

We add all the numbers together, and all the variables

-3y+86=0

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

-3y=-86

y=-86/-3

y=28+2/3

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