20=4-2y

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Solution for 20=4-2y equation: 



20=4-2y

We move all terms to the left:

20-(4-2y)=0

We add all the numbers together, and all the variables

-(-2y+4)+20=0

We get rid of parentheses

2y-4+20=0

We add all the numbers together, and all the variables

2y+16=0

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

2y=-16

y=-16/2

y=-8

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