Julian and David had $665. Julian spent
25 of his money on a portable air-conditioner. David spent
14 of his money on a home theater system. The portable air-conditioner cost $110 more than the home theater system. How much money had Julian left?
| |
Julian |
David |
Total |
Before |
5 u |
+ 275 |
4x2 =
8 u |
665 |
Change |
- 2 u |
- 110 |
- 1x2 =
- 2 u |
|
Comparing the portable air-conditioner
and the home theater system |
110 more |
|
|
After |
3 u |
+ 165 |
3x2 =
6 u |
|
110 ÷ 2 = 55
3 x 55 = 165
5 x 55 = 275
Total amount that Julian and David had at first
= 5 u + 275 + 8 u
= 13 u + 275
13 u + 275 = 665
13 u = 665 - 275
13 u = 390
1 u = 390 ÷ 13 = 30
Amount that Julian had left
= 3 u + 165
= 3 x 30 + 165
= 90 + 165
= $255
Answer(s): $255
