Problema Solution
The older brother Bob is two year older than his little sister Alice. Taken together, the sum of their ages is 8
Answer provided by our tutors
let
b = the age of Bob
a = the age of Alice
Bob is two year older than his little sister Alice
b = 2 + a
the sum of their ages is 8
a + b = 8
by solving the system of equations
b = 2 + a
a + b = 8
we find
a = 3 years
b = 5 years
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Bob is 5 years old and Alice is 3 years old.