Justin and Zeph had $1350. Justin spent
49 of his money on a portable air-conditioner. Zeph spent
14 of his money on a home theater system. The portable air-conditioner cost $300 more than the home theater system. How much money did Justin have at first?
|
Justin |
Zeph |
Total |
Before |
9 u |
+ 675 |
4x4 = 16 u |
1350 |
Change |
- 4 u |
- 300 |
- 1x4 = - 4 u |
|
Comparing the portable air-conditioner and the home theater system |
300 more |
|
|
After |
5 u |
+ 375 |
3x4 = 12 u |
|
300 ÷ 4 = 75
5 x 75 = 375
9 x 75 = 675
Total amount that Justin and Zeph had at first
= 9 u + 675 + 16 u
= 25 u + 675
25 u + 675 = 1350
25 u = 1350 - 675
25 u = 675
1 u = 675 ÷ 25 = 27
Amount that Justin had at first
= 9 u + 675
= 9 x 27 + 675
= 243 + 675
= $918
Answer(s): $918