0.8d+1.3d-7.4=20

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Solution for 0.8d+1.3d-7.4=20 equation: 



0.8d+1.3d-7.4=20

We move all terms to the left:

0.8d+1.3d-7.4-(20)=0

We add all the numbers together, and all the variables

2.1d-27.4=0

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

2.1d=27.4

d=27.4/2.1

d=13+0.099999999999998/2.1

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