Lizzy: Lorin has 4 black marbles. Jimmy has 22 yellow marbles. Alex had twice as many black marbles as Lorin and one half as many yellow marbles as Jimmy. How many marbles does Alex have?.
Me: Hmmm, let me think. I think this is the detailed solution:
Alex has 2 * 4 = 8 black marbles. Alex has 22 / 2 = 11 yellow marbles. Alex has 8 + 11 = 19 marbles. Final answer: 19.