Question 1047041
Call their ages NOW, b and m.
Then we write
b = m + 4
Now five years ago, we had
(b-5) + (m-5) = 48
We can plug in for b and get
(m+4-5) + (m-5) = 48
(m-1) + (m-5) = 48
2m - 6 = 48
2m = 54
m = 27 years old
and then
b = 31 years old