Answers

2015-11-30T20:09:01+08:00
My answer is 31, 49-13=36-5=31
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  • Brainly User
2015-12-01T11:38:15+08:00
Let n be the number of channels:

5 + n + 13 = 49
n + 18 = 49
n = 49 - 18
n = 31

The number of channel is 31.

Check:
5 + 31 + 13 = 49
36 + 13 = 49
49 = 49
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