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.



Which of the following equations could be used to solve the problem?

3 x + 2 x
3 x + 6 = 2 x + 6
3 x + 6 = 2( x + 6)
x + 6 = 2(3 x + 6)