Question

Ralph is 3 times as old as Sara. In 4 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now.

If x represents Sarah's age now, which of the following expressions represents Ralph's age in four years?

Answer 1

Ralph is 12. If Ralph is 12 that means Sara is 4 (12/4=3). In 4 years Sara will be 8 and Ralph would be 16 (16/8=2).

Answer 2

let age of sarah is x then ralph is 3x
after 4 years sarah age is x+4 and ralph age is 3x+4
acc to stat 3x+4=2(x+4)
3x-2x=8-4
x=4
sarah age is 4 years and ralph age is 12 years