The city

In the city is 2/4 of women married to 3/4 men. What percentage of townspeople is single (not married)?

Correct result:

p =  60 %

Solution:

m+z = 100
2/4 z = 3/4 m
p = 2/4 z + 3/4m

m+z = 100
2/4•z = 3/4•m
p = 2/4•z + 3/4•m

m+z = 100
3m-2z = 0
3m-4p+2z = 0

m = 40
p = 60
z = 60

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