4y-9y=-20

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Solution for 4y-9y=-20 equation: 



4y-9y=-20

We move all terms to the left:

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

We add all the numbers together, and all the variables

-5y+20=0

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

-5y=-20

y=-20/-5

y=+4

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