Olivia, Tina and Opal went shopping together. They brought a total of $1162 with them. Olivia spent 20% of her money. Tina spent $196 and Opal spent twice as much money as Olivia. In the end, they had $636 left. How much money did Tina and Opal have altogether in the end?
| |
Olivia |
Tina |
Opal |
Total |
| Before |
5 u |
|
|
1162 |
| Change |
- 1 u |
- 196 |
- 2 u |
- 526 |
| After |
4 u |
? |
636 |
20% =
20100 =
15 Olivia spent: Olivia's total = 1 : 5
Amount that Opal spent
= 2 x 1 u
= 2 u
Amount that the three girls spent
= 1 u + 2 u + 196
= 3 u + 196
Amount that the three girls spent
= 1162 - 636
= $526
3 u + 196 = 526
3 u = 526 - 196
3 u = 330
1 u = 330 ÷ 3 = 110
Amount that Tina and Opal had in the end
= 636 - 4 u
= 636 - 4 x 110
= 636 - 440
= $196
Answer(s): $196
