Ben spent 15 of his money on drinks, 16 of the remaining money on a swiss roll and $35 on balloons. He had 13 of his money. How much money did he have at first?
| Drinks |
Remaining amount |
Total |
| 1x3 |
4x3 |
5x3 |
| |
Swiss Roll |
Balloons |
Left |
|
| |
1x2 |
5x2 |
|
| 3 u |
2 u |
10 u |
15 u |
Fraction of the amount that Ben had left after spending on drinks
= 1 -
15 =
45 Fraction of the remaining amount that Ben had left after spending on a swiss roll
= 1 -
16 =
56 The remaining amount is the combined repeated identity. Make the remaining amount the same. LCM of 4 and 6 is 12.
Amount that Ben had left
=
13 x 15 u
= 5 u
Amount that Ben spent on balloons
= 10 u - 5 u
= 5 u
5 u = 35
1 u = 35 ÷ 5 = 7
Total amount that Ben had at first
= 15 u
= 15 x 7
= $105
Answer(s): $105
