Gwen, Natalie and Betty went shopping together. They brought a total of $1864 with them. Gwen spent 30% of her money. Natalie spent $278 and Betty spent four times as much money as Gwen. In the end, they had $731 left. How much money did Natalie and Betty have altogether in the end?
| |
Gwen |
Natalie |
Betty |
Total |
| Before |
10 u |
|
|
1864 |
| Change |
- 3 u |
- 278 |
- 12 u |
- 1133 |
| After |
7 u |
? |
731 |
30% =
30100 =
310 Gwen spent: Gwen's total = 3 : 10
Amount that Betty spent
= 4 x 3 u
= 12 u
Amount that the three girls spent
= 3 u + 12 u + 278
= 15 u + 278
Amount that the three girls spent
= 1864 - 731
= $1133
15 u + 278 = 1133
15 u = 1133 - 278
15 u = 855
1 u = 855 ÷ 15 = 57
Amount that Natalie and Betty had in the end
= 731 - 7 u
= 731 - 7 x 57
= 731 - 399
= $332
Answer(s): $332
