5.2=2.1-0.4y

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Solution for 5.2=2.1-0.4y equation: 



5.2=2.1-0.4y

We move all terms to the left:

5.2-(2.1-0.4y)=0

We add all the numbers together, and all the variables

-(-0.4y+2.1)+5.2=0

We get rid of parentheses

0.4y-2.1+5.2=0

We add all the numbers together, and all the variables

0.4y+3.1=0

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

0.4y=-3.1

y=-3.1/0.4

y=-7+0.3/0.4

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