Ivory and Tina had equal amount of money. Each day, Ivory spent $3 and Tina spent $10. When Ivory had $105 left, Tina had
25 as much money left as Ivory. How much money did the two girls have at first?
| |
Ivory |
Tina |
| Before |
3 u + 105 |
10 u + 42 |
| Change |
- 3 u |
- 10 u |
| After |
$105 |
$42 |
Amount that Tina had left
=
25 x 105
= $42
The amount that Ivory and Tina had at first is the same.
10 u + 42 = 3 u + 105
10 u - 3 u = 105 - 42
7 u = 63
1 u = 63 ÷ 7 = 9
Amount that Ivory had at first
= 3 u + 105
= 3 x 9 + 105
= 27 + 105
= $132
Total amount that both girls had at first
= 2 x 132
= $264
Answer(s): $264
