2.1=0.4y

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Solution for 2.1=0.4y equation: 



2.1=0.4y

We move all terms to the left:

2.1-(0.4y)=0

We add all the numbers together, and all the variables

-(+0.4y)+2.1=0

We get rid of parentheses

-0.4y+2.1=0

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

-0.4y=-2.1

y=-2.1/-0.4

y=5+0.1/0.4

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