Tom and Riordan received a total of $272. After Tom spent
78 of his money and Riordan spent
34 of his money, Riordan had 2 times as much money as Tom. How much money did Riordan have at first?
| |
Tom |
Riordan |
Total |
Before |
8 u |
4x2 =
8 u |
16 u |
Change |
- 7 u |
- 3x2 =
- 6 u |
|
After |
1 u |
1x2 =
2 u |
|
Comparing Tom
and Riordan in the end |
1 u |
2 u |
|
The amount that Riordan had in the end is the same. Make the amount that Riordan had in the end the same. LCM of 1 and 2 is 2.
Total amount that Riordan and Tom had at first
= 8 u + 8 u
= 16 u
16 u = 272
1 u = 272 ÷ 16 = 17
Amount that Riordan had at first
= 8 u
= 8 x 17
= $136
Answer(s): $136
