Discover how IDNLearn.com can help you find the answers you need quickly and easily. Ask any question and receive accurate, in-depth responses from our dedicated team of experts.
A student solved this problem by working backward.
Tom had some marbles. He had three times as many marbles as Ralph. Ralph had 6 marbles. Tom lost 3 marbles and bought 6 new marbles. How many marbles does Tom have now?
Student's solution - Ralph has 6 marbles, so Tom has 6 × 3 marbles to begin with. So Tom has 18 marbles. He lost 3, so 18 – 3 = 15, and bought 6, so 15 + 6 = 21. So Tom now has 21 marbles.
Here is a problem that can also be solved by working backward.
Alex bought twice as many pears as apples. He bought 4 more pears than oranges. He bought 6 apples.
He bought 8 oranges. If he had 2x as many pears as he did apples, then that means he has 12 pears and if he bought four more pears then he did oranges (12-4) that means he has 8 oranges.
Thank you for using this platform to share and learn. Keep asking and answering. We appreciate every contribution you make. IDNLearn.com has the solutions to your questions. Thanks for stopping by, and come back for more insightful information.
