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OpenStudy (anonymous):
please help! at a dog park there are dogs and their masters. counting heads there are 20 and counting legs there are 62 .. how many dogs and masters are there?
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OpenStudy (mertsj):
heads = dogs + masters legs = 4 times dogs + 2 times masters With letters: h=d+m l=4d+2m Now substitute 20 for h and 62 for l and solve.
OpenStudy (anonymous):
can youwork this out for me please.. i ll get it next time around
OpenStudy (mertsj):
d+m=20 4d+2m=62 From the first equation, m = 20-d Replace m in the second equation with 20-d and solve for d
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