Tom and Vincent had $1125. Tom spent
25 of his money on a notebook. Vincent spent
14 of his money on a portable air-conditioner. The notebook cost $268 more than the portable air-conditioner. How much money had Tom left?
|
Tom |
Vincent |
Total |
Before |
5 u |
+ 670 |
4x2 = 8 u |
1125 |
Change |
- 2 u |
- 268 |
- 1x2 = - 2 u |
|
Comparing the notebook and the portable air-conditioner |
268 more |
|
|
After |
3 u |
+ 402 |
3x2 = 6 u |
|
268 ÷ 2 = 134
3 x 134 = 402
5 x 134 = 670
Total amount that Tom and Vincent had at first
= 5 u + 670 + 8 u
= 13 u + 670
13 u + 670 = 1125
13 u = 1125 - 670
13 u = 455
1 u = 455 ÷ 13 = 35
Amount that Tom had left
= 3 u + 402
= 3 x 35 + 402
= 105 + 402
= $507
Answer(s): $507