100=21.8+d

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Solution for 100=21.8+d equation: 



100=21.8+d

We move all terms to the left:

100-(21.8+d)=0

We add all the numbers together, and all the variables

-(d+21.8)+100=0

We get rid of parentheses

-d-21.8+100=0

We add all the numbers together, and all the variables

-1d+78.2=0

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

-d=-78.2

d=-78.2/-1

d=78+0.2/1

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