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Q: What must be subtracted from -7 to obtain -15?

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-7

22

14

The answer depends on what "it" is. That has not been specified: I could make a guess but then I may as well make up my own question and answer it!

5 hours subtracted from 7 hours is 2 hours. 5 minutes subtracted from 20 minutes is 15 minutes.Therefore, the answer is 2 hours 15 minutes

0.58 subtracted by 7 = -6.42

-104

21

60 -15 = 45

7x - 25 = 15 7x = 40 x = 40/7 or 5 and 5/7

23

7 hours subtracted by 30 minutes = -23

Each number is 15 subtracted from the preceding number.

8 hrs 35 min

4

21

-4

7/16 - 7/32 = 7/32

234

34/8 - 49/8 = -15/8 or -1 and 7/8

-6.93

7

-1288

1.5 subtracted from 8.5 is one of infinitely many possible answers.

.82