Justin and Ken had $1262. Justin spent
58 of his money on a computer. Ken spent
13 of his money on a notebook. The computer cost $300 more than the notebook. How much money had Justin left?
| |
Justin |
Ken |
Total |
Before |
8 u |
+ 480 |
3x5 =
15 u |
1262 |
Change |
- 5 u |
- 300 |
- 1x5 =
- 5 u |
|
Comparing the computer
and the notebook |
300 more |
|
|
After |
3 u |
+ 180 |
2x5 =
10 u |
|
300 ÷ 5 = 60
3 x 60 = 180
8 x 60 = 480
Total amount that Justin and Ken had at first
= 8 u + 480 + 15 u
= 23 u + 480
23 u + 480 = 1262
23 u = 1262 - 480
23 u = 782
1 u = 782 ÷ 23 = 34
Amount that Justin had left
= 3 u + 180
= 3 x 34 + 180
= 102 + 180
= $282
Answer(s): $282
