9d+3d=12+4=0

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Solution for 9d+3d=12+4=0 equation:



9d+3d=12+4=0
We move all terms to the left:
9d+3d-(12+4)=0
We add all the numbers together, and all the variables
9d+3d-16=0
We add all the numbers together, and all the variables
12d-16=0
We move all terms containing d to the left, all other terms to the right
12d=16
d=16/12
d=1+1/3

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