SOLUTION: There is a question in my book that I dont really understand. To me it seems like maybe there is not enough information. I will write the exact question down for you: <BR> In t

You can put this solution on YOUR website!
This problem would be easier to show you on something physical that we could both move, but I'll do my best to explain here:


A has the coordinate of 0, so start with A:


0
A


Since D is the midpoint between C & E, and D is 6 points to the left of E, we know that there are 12 points between C & E. We can use place holders for this because we don't have the actual numbers yet:
A ..?.. C...-6pts......D......6pts......E


We also know that C is the midpoint between A and E. Since there are 12 points between C & E, there must be 12 points between A & C:
A............12pts.............C........6pts........D.........6pts.........E


Now we just need to add B into this, 5 points to the left of C:
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
A................B...............C....................D....................E


B is 7, C is 12, D is 18