4.2=28.2-2d

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Solution for 4.2=28.2-2d equation: 



4.2=28.2-2d

We move all terms to the left:

4.2-(28.2-2d)=0

We add all the numbers together, and all the variables

-(-2d+28.2)+4.2=0

We get rid of parentheses

2d-28.2+4.2=0

We add all the numbers together, and all the variables

2d-24=0

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

2d=24

d=24/2

d=12

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