Sam and Vaidev had $1005. Sam spent
59 of his money on a refrigerator. Vaidev spent
13 of his money on a portable air-conditioner. The refrigerator cost $105 more than the portable air-conditioner. How much money had Sam left?
|
Sam |
Vaidev |
Total |
Before |
9 u |
+ 189 |
3x5 = 15 u |
1005 |
Change |
- 5 u |
- 105 |
- 1x5 = - 5 u |
|
Comparing the refrigerator and the portable air-conditioner |
105 more |
|
|
After |
4 u |
+ 84 |
2x5 = 10 u |
|
105 ÷ 5 = 21
4 x 21 = 84
9 x 21 = 189
Total amount that Sam and Vaidev had at first
= 9 u + 189 + 15 u
= 24 u + 189
24 u + 189 = 1005
24 u = 1005 - 189
24 u = 816
1 u = 816 ÷ 24 = 34
Amount that Sam had left
= 4 u + 84
= 4 x 34 + 84
= 136 + 84
= $220
Answer(s): $220