Ralph is 3 times as old as Sara. In 6 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 six years? 2x 6x

Let r = ralphs age, and x=saras age in six years, ralph will be r+6 years old, and sara will be x+6 years old. but since ralph will be two times as old as sara, (r+6) = 2 (x+6) you just have to simplify that equation and solve for r.