-(-20-3y)+9y=-4

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Solution for -(-20-3y)+9y=-4 equation: 



-(-20-3y)+9y=-4

We move all terms to the left:

-(-20-3y)+9y-(-4)=0

We add all the numbers together, and all the variables

-(-3y-20)+9y-(-4)=0

We add all the numbers together, and all the variables

9y-(-3y-20)+4=0

We get rid of parentheses

9y+3y+20+4=0

We add all the numbers together, and all the variables

12y+24=0

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

12y=-24

y=-24/12

y=-2

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