21=9.8+d

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Solution for 21=9.8+d equation: 



21=9.8+d

We move all terms to the left:

21-(9.8+d)=0

We add all the numbers together, and all the variables

-(d+9.8)+21=0

We get rid of parentheses

-d-9.8+21=0

We add all the numbers together, and all the variables

-1d+11.2=0

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

-d=-11.2

d=-11.2/-1

d=11+0.2/1

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