4y-4=-5y-21

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Solution for 4y-4=-5y-21 equation: 



4y-4=-5y-21

We move all terms to the left:

4y-4-(-5y-21)=0

We get rid of parentheses

4y+5y+21-4=0

We add all the numbers together, and all the variables

9y+17=0

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

9y=-17

y=-17/9

y=-1+8/9

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