20y+9=2y-12

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Solution for 20y+9=2y-12 equation: 



20y+9=2y-12

We move all terms to the left:

20y+9-(2y-12)=0

We get rid of parentheses

20y-2y+12+9=0

We add all the numbers together, and all the variables

18y+21=0

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

18y=-21

y=-21/18

y=-1+1/6

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