Marion and Jen had $110 at first. Marion spent
58 of her money and Jen spent
45 of her money. Given that they had $85 left, how much did Marion have at first?
|
Marion |
Jen |
Total |
Before |
8 u |
5 p |
$110 |
Change |
- 5 u |
- 4 p |
|
After |
3 u |
1 p |
$85 |
8 u + 5 p = 110 --- (1)
3 u + 1 p = 85 --- (2)
(2) x 5 15 u + 5 p = 425 --- (3)
(3) - (1)
15 u - 8 u = 425 - 110
7 u = 315
1 u = 315 ÷ 7 = 45
Amount that Marion had at first
= 8 u
= 8 x 45
= $360
Answer(s): $360