Question 186309
Paul's age now = 2x - 6

Lucien's age now = x

Paul's age 2 years ago = (2x - 6) - 2

Lucien's age 2 years ago = x - 2

(2x - 6) - 2 + x - 2 = 29

3x - 10 = 29

3x = 10 + 29

3x = 39

x = 39/3

x = 13

Lucien is 13 years old.