Lizzy: Joshua and Justin shared $40. Joshua's share was thrice as much as Justin's. How much is Joshua's share?.
Me: Hmmm, let me think. I think this is the detailed solution:
The $40 is divided into 1 part for Justin + 3 parts for Joshua = 4 parts. So each part is equal to $40 / 4 = $10. Therefore, Joshua's share is $10 x 3 = $30. Final answer: 30.