4.2=1.9-0.4y

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Solution for 4.2=1.9-0.4y equation: 



4.2=1.9-0.4y

We move all terms to the left:

4.2-(1.9-0.4y)=0

We add all the numbers together, and all the variables

-(-0.4y+1.9)+4.2=0

We get rid of parentheses

0.4y-1.9+4.2=0

We add all the numbers together, and all the variables

0.4y+2.3=0

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

0.4y=-2.3

y=-2.3/0.4

y=-5+0.3/0.4

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