Daniel and Tommy went shopping with a total amount of $330. They had $264 left after shopping. Daniel's remaining money was 3 times the amount he paid for. Tommy's remaining money was 5 times the amount he had spent.
- How much did Tommy spend?
- How much did Tommy bring along for shopping?
|
Daniel |
Tommy |
Total |
Before |
4 u |
6 p |
330 |
Change |
- 1 u |
- 1 p |
- 66 |
After |
3 u |
5 p |
264 |
(a)
Amount that Daniel and Tommy spent
= 330 - 264
= $66
Amount that Daniel and Tommy spent
= 1 u + 1 p
1 u + 1 p = 66
1 u = 66 - 1 p --- (1)
Amount that Daniel and Tommy had left
= 3 u + 5 p
3 u + 5 p = 264
3 u = 264 - 5 p --- (2)
Make u the same.
(1)
x 3 3 u = 198 - 3 p --- (3)
(3) = (2)
198 - 3 p = 264 - 5 p
5 p - 3 p = 264 - 198
2 p = 66
1 p = 66 ÷ 2 = 33
Amount that Tommy spent = $33
(b)
Amount that Tommy brought along
= 6 p
= 6 x 33
= $198
Answer(s): (a) $33; (b) $198