Please help, and solve with system of equations.

Mathematics
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A birding club holds an annual photography contest among its members. After a set time limit in a particular park, contestants receive 4 points for photos of songbirds and 20 points for photos of birds of prey. last year's winner had a total of 200 points from 38 photos of individual birds. How many of each type of bird did the winner photograph?

Apr 22nd, 2015

4s+20p=200 ; s+p=38. By eq. 2, s=38-p. Thus by eq 1. ,  4(38-p)+20p=200. 152-4p+20p=200; 16p=48; p=3. Thus by eq. 2, s=35.

Apr 22nd, 2015

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Apr 22nd, 2015
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Apr 22nd, 2015
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