Zeph and Mark had $684. Zeph spent
25 of his money on a washing machine. Mark spent
17 of his money on a laptop. The washing machine cost $114 more than the laptop. How much money did Zeph have at first?
| |
Zeph |
Mark |
Total |
Before |
5 u |
+ 285 |
7x2 =
14 u |
684 |
Change |
- 2 u |
- 114 |
- 1x2 =
- 2 u |
|
Comparing the washing machine
and the laptop |
114 more |
|
|
After |
3 u |
+ 171 |
6x2 =
12 u |
|
114 ÷ 2 = 57
3 x 57 = 171
5 x 57 = 285
Total amount that Zeph and Mark had at first
= 5 u + 285 + 14 u
= 19 u + 285
19 u + 285 = 684
19 u = 684 - 285
19 u = 399
1 u = 399 ÷ 19 = 21
Amount that Zeph had at first
= 5 u + 285
= 5 x 21 + 285
= 105 + 285
= $390
Answer(s): $390
