Lily F.

asked • 10/01/15

i have 192 legs. some are spider legs and some are fly legs. the total number of spiders and flies = 29

If I have 29 spiders AND flies, and there are a total of 192 legs between them, how many spiders are there?  How many flies?

2 Answers By Expert Tutors

By:

Mark M. answered • 10/01/15

Mathematics Teacher - NCLB Highly Qualified

Neal B.

tutor
I thought these were the guidelines, "Answering questions in a way that leads a student to understand how to arrive at the answer is preferable to just providing the answer."
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10/01/15

Lily F.

I don't understand y you multiplied s+f by 8.  Can you explain?
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10/01/15

Mark M.

tutor
The process is "solving systems by elimination." I selected 8 since I could subtract the bottom equation from the top equation and eliminate the "s."
I could have multiplied by 6 to eliminate the f. The results would be the same.
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10/01/15

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