Four years back, a father was 32 years older than his son. At present the father is 3 times as old as the son. How old will the son be three years from now? Pick one:
A) 16 years
B) 17 years
C) 18 years
D) 19 years
E) 20 years
Using linear equations to convert the word problem:   ** F = fathers current ageS = sons current age   #1 Four years back, a father was 32 years older than his son: F-4 = 32 + (S - 4)   #2 At present the father is 3 times as old as the son: F = 3*S   How old will the son be three years from now?: S + 3 = ?   With two variables and two linear equations we are able to solve the problem:   (S*3) - 4 = 32 +S -4   2S=32   S = 16   S + 3 = 16 + 3= 
<gadget id="calculator">16 + 3</gadget>
<output>19</output>
19   Answer: 19 years
<result>D</result>
Four years back, a father was 32 years older than his son. At present the father is 3 times as old as the son. How old will the son be three years from now?