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4.2d-17-2.2d+43=-1.4
We move all terms to the left:
4.2d-17-2.2d+43-(-1.4)=0
We add all the numbers together, and all the variables
2d+27.4=0
We move all terms containing d to the left, all other terms to the right
2d=-27.4
d=-27.4/2
d=-13+1/1.42857142857
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