Yoko and Gillian had $148 at first. Yoko spent
37 of her money and Gillian spent
23 of her money. Given that they had $91 left, how much did Yoko have at first?
|
Yoko |
Gillian |
Total |
Before |
7 u |
3 p |
$148 |
Change |
- 3 u |
- 2 p |
|
After |
4 u |
1 p |
$91 |
7 u + 3 p = 148 --- (1)
4 u + 1 p = 91 --- (2)
(2) x 3 12 u + 3 p = 273 --- (3)
(3) - (1)
12 u - 7 u = 273 - 148
5 u = 125
1 u = 125 ÷ 5 = 25
Amount that Yoko had at first
= 7 u
= 7 x 25
= $175
Answer(s): $175