Jen and Shannon had $94 at first. Jen spent
58 of her money and Shannon spent
45 of her money. Given that they had $79 left, how much did Jen have at first?
|
Jen |
Shannon |
Total |
Before |
8 u |
5 p |
$94 |
Change |
- 5 u |
- 4 p |
|
After |
3 u |
1 p |
$79 |
8 u + 5 p = 94 --- (1)
3 u + 1 p = 79 --- (2)
(2) x 5 15 u + 5 p = 395 --- (3)
(3) - (1)
15 u - 8 u = 395 - 94
7 u = 301
1 u = 301 ÷ 7 = 43
Amount that Jen had at first
= 8 u
= 8 x 43
= $344
Answer(s): $344