20=0.8y-0.4

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Solution for 20=0.8y-0.4 equation: 



20=0.8y-0.4

We move all terms to the left:

20-(0.8y-0.4)=0

We get rid of parentheses

-0.8y+0.4+20=0

We add all the numbers together, and all the variables

-0.8y+20.4=0

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

-0.8y=-20.4

y=-20.4/-0.8

y=25+0.4/0.8

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