3d-(9-d)=51

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Solution for 3d-(9-d)=51 equation: 



3d-(9-d)=51

We move all terms to the left:

3d-(9-d)-(51)=0

We add all the numbers together, and all the variables

3d-(-1d+9)-51=0

We get rid of parentheses

3d+1d-9-51=0

We add all the numbers together, and all the variables

4d-60=0

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

4d=60

d=60/4

d=15

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