Justin and George had $988. Justin spent
35 of his money on a portable air-conditioner. George spent
18 of his money on a refrigerator. The portable air-conditioner cost $210 more than the refrigerator. How much money did Justin have at first?
|
Justin |
George |
Total |
Before |
5 u |
+ 350 |
8x3 = 24 u |
988 |
Change |
- 3 u |
- 210 |
- 1x3 = - 3 u |
|
Comparing the portable air-conditioner and the refrigerator |
210 more |
|
|
After |
2 u |
+ 140 |
7x3 = 21 u |
|
210 ÷ 3 = 70
2 x 70 = 140
5 x 70 = 350
Total amount that Justin and George had at first
= 5 u + 350 + 24 u
= 29 u + 350
29 u + 350 = 988
29 u = 988 - 350
29 u = 638
1 u = 638 ÷ 29 = 22
Amount that Justin had at first
= 5 u + 350
= 5 x 22 + 350
= 110 + 350
= $460
Answer(s): $460