Respuesta :

SuperLegend
9d + d + 2d - 4 = 6d
Add d to 9d
10d+2d-4=6d
Add 2d to 10d
12d-4=6d
Subtract 12d from both sides
-4=-6d
Divide -6 on both sides
Final Answer: 4/6 or 2/3 *Both answers are equivalent to each other.
Photon
Hello,

First, you have to solve this equation :
9d + d + 2d - 4 = 6d
9d + d + 2d - 6d = 4
6d = 4
d = 4/6 = 2*2/2*3 = 2/3

In short, the answer would be : A) 2/3

Hope this helps !