Question 33108
son' current age =x
dad's age as of two years ago = 4(x-2) 
dad's age now = 4(x-2) + 2
4(x-2) + 2 + 3 = 3(x+3)
=> 4x - 3 = 3x + 9
=> x = 12
Son is now 12 years old and dad is 42 years.