-(y-6)=21

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Solution for -(y-6)=21 equation: 



-(y-6)=21

We move all terms to the left:

-(y-6)-(21)=0

We get rid of parentheses

-y+6-21=0

We add all the numbers together, and all the variables

-1y-15=0

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

-y=15

y=15/-1

y=-15

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