Question 312394
We have a system of equations in two variables expressed as an age question. 

Let: b = boy's age now

Let f = father's age now

first sentence and equation:

b + 2 = f/4, f = 4b + 8 eq.1

2nd sentence and equation:

5 yrs ago, their ages were:

For the boy : b - 5 

for the father: f - 5

f - 5 = 10 (b-5) - 1

simplifying

f = 10 b - 46 eq.2

Equate equations 1 and 2

4b + 8 = 10b - 46

b = 9 yrs. old

The boy is 9 years old.

f = 4(9) + 8

f = 44 yrs.old

The father is 44 years old.

Understand?