-8.1+1.5d=12.9

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Solution for -8.1+1.5d=12.9 equation: 



-8.1+1.5d=12.9

We move all terms to the left:

-8.1+1.5d-(12.9)=0

We add all the numbers together, and all the variables

1.5d-21=0

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

1.5d=21

d=21/1.5

d=14

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