Suppose in 1992 Chris was x years old, his brother was then 2x years old. 6 years later in 1998, Chris is (x+6) years old, his brother is (2x+6), (x+6)=(2/3)(2x+6) x+6=(4/3)x+4 (4/3)x-x=6-4 (1/3)x=3 x=6 in 1992, Chris was 6, so in 2018 he will be 6+(2018-1992)=32 years old.
