Posted by **Stuart** on Tuesday, March 1, 2011 at 7:54pm.

12 - 9 = 15d + 9? please help with operations

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**Ms. Sue**, Tuesday, March 1, 2011 at 7:57pm
Please do not keep posting the same problem over and over. You try to do this one, and I'll check your work in an hour.

- Math -
**Anonymous**, Tuesday, March 1, 2011 at 11:38pm
12-9=15d+9

3=15d+9

3-9=15d

-6=15d

15d= -6

3*5*d= -3*2 Divide with 3

5d= -2 Divide with 5

d= -2/5= -0.4

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