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?

Question

mertsj · Answer

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.

anonymous · Answer

can youwork this out for me please.. i ll get it next time around

mertsj · Answer

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