20d-12d+2d-d=18

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Solution for 20d-12d+2d-d=18 equation:



20d-12d+2d-d=18
We move all terms to the left:
20d-12d+2d-d-(18)=0
We add all the numbers together, and all the variables
9d-18=0
We move all terms containing d to the left, all other terms to the right
9d=18
d=18/9
d=2

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