12d-(-18)=21

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Solution for 12d-(-18)=21 equation: 



12d-(-18)=21

We move all terms to the left:

12d-(-18)-(21)=0

determiningTheFunctionDomain
12d-21-(-18)=0

We add all the numbers together, and all the variables

12d-3=0

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

12d=3

d=3/12

d=1/4

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