Simon spent 18 of his money on snacks, 14 of the remaining money on a cake and $25 on balloons. He had 12 of his money. How much money did he have at first?
| Snacks |
Remaining amount |
Total |
| 1x4 |
7x4 |
8x4 |
| |
Cake |
Balloons |
Left |
|
| |
1x7 |
3x7 |
|
| 4 u |
7 u |
21 u |
32 u |
Fraction of the amount that Simon had left after spending on snacks
= 1 -
18 =
78 Fraction of the remaining amount that Simon had left after spending on a cake
= 1 -
14 =
34 The remaining amount is the combined repeated identity. Make the remaining amount the same. LCM of 7 and 4 is 28.
Amount that Simon had left
=
12 x 32 u
= 16 u
Amount that Simon spent on balloons
= 21 u - 16 u
= 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Total amount that Simon had at first
= 32 u
= 32 x 5
= $160
Answer(s): $160
