19.9=d+7

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Solution for 19.9=d+7 equation: 



19.9=d+7

We move all terms to the left:

19.9-(d+7)=0

We get rid of parentheses

-d-7+19.9=0

We add all the numbers together, and all the variables

-1d+12.9=0

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

-d=-12.9

d=-12.9/-1

d=12+0.9/1

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