15=9-1/2d

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Solution for 15=9-1/2d equation: 



15=9-1/2d

We move all terms to the left:

15-(9-1/2d)=0



Domain of the equation: 2d)!=0

d!=0/1

d!=0

d∈R



We add all the numbers together, and all the variables

-(-1/2d+9)+15=0

We get rid of parentheses

1/2d-9+15=0

We multiply all the terms by the denominator


-9*2d+15*2d+1=0

Wy multiply elements

-18d+30d+1=0

We add all the numbers together, and all the variables

12d+1=0

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

12d=-1

d=-1/12

d=-1/12

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