15-3-y=y-20

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Solution for 15-3-y=y-20 equation: 



15-3-y=y-20

We move all terms to the left:

15-3-y-(y-20)=0

We add all the numbers together, and all the variables

-1y-(y-20)+12=0

We get rid of parentheses

-1y-y+20+12=0

We add all the numbers together, and all the variables

-2y+32=0

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

-2y=-32

y=-32/-2

y=+16

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