Oliver and Vincent had $1210. Oliver spent
38 of his money on a computer. Vincent spent
16 of his money on a home theater system. The computer cost $210 more than the home theater system. How much money had Oliver left?
|
Oliver |
Vincent |
Total |
Before |
8 u |
+ 560 |
6x3 = 18 u |
1210 |
Change |
- 3 u |
- 210 |
- 1x3 = - 3 u |
|
Comparing the computer and the home theater system |
210 more |
|
|
After |
5 u |
+ 350 |
5x3 = 15 u |
|
210 ÷ 3 = 70
5 x 70 = 350
8 x 70 = 560
Total amount that Oliver and Vincent had at first
= 8 u + 560 + 18 u
= 26 u + 560
26 u + 560 = 1210
26 u = 1210 - 560
26 u = 650
1 u = 650 ÷ 26 = 25
Amount that Oliver had left
= 5 u + 350
= 5 x 25 + 350
= 125 + 350
= $475
Answer(s): $475