Tommy and Pierre had $1244. Tommy spent
25 of his money on a laptop. Pierre spent
17 of his money on a portable air-conditioner. The laptop cost $262 more than the portable air-conditioner. How much money did Tommy have at first?
|
Tommy |
Pierre |
Total |
Before |
5 u |
+ 655 |
7x2 = 14 u |
1244 |
Change |
- 2 u |
- 262 |
- 1x2 = - 2 u |
|
Comparing the laptop and the portable air-conditioner |
262 more |
|
|
After |
3 u |
+ 393 |
6x2 = 12 u |
|
262 ÷ 2 = 131
3 x 131 = 393
5 x 131 = 655
Total amount that Tommy and Pierre had at first
= 5 u + 655 + 14 u
= 19 u + 655
19 u + 655 = 1244
19 u = 1244 - 655
19 u = 589
1 u = 589 ÷ 19 = 31
Amount that Tommy had at first
= 5 u + 655
= 5 x 31 + 655
= 155 + 655
= $810
Answer(s): $810