In the room are four-legged chairs and three-legged stools, and all are fitted with (one) person. I counted all the legs in the room, and there were 39. How many are there chairs, stools, and people?

Correct answer:

x =  4
y =  3
z =  7

Step-by-step explanation:

39=(4+2)x+(3+2)y z=x+y  x=4;y=3 z=x+y=4+3=7

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