Problema Solution
the ratio of don's age to kuu's age is 3 to 4,two years ago our average age was 12 years,how old is don
Answer provided by our tutors
let
d = dons age now
k = kuu's age now
the ratio of don's age to kuu's age is 3 to 4
d : k = 3 : 4 cross multiply
4d = 3k
two years ago their average age was 12 years
(d - 2 + k - 2)/2 = 12 multiply both sides by 2
d + k - 4 = 24
by solving the system of equations
4d = 3k
d + k - 4 = 24
we find
d = 12 years
k = 16 years
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don is 12 years old now.