Erika and Yoko had equal amount of money. Each day, Erika spent $16 and Yoko spent $21. When Erika had $110 left, Yoko had
12 as much money left as Erika. How much money did the two girls have at first?
| |
Erika |
Yoko |
| Before |
16 u + 110 |
21 u + 55 |
| Change |
- 16 u |
- 21 u |
| After |
$110 |
$55 |
Amount that Yoko had left
=
12 x 110
= $55
The amount that Erika and Yoko had at first is the same.
21 u + 55 = 16 u + 110
21 u - 16 u = 110 - 55
5 u = 55
1 u = 55 ÷ 5 = 11
Amount that Erika had at first
= 16 u + 110
= 16 x 11 + 110
= 176 + 110
= $286
Total amount that both girls had at first
= 2 x 286
= $572
Answer(s): $572
