Tammy and Jane had $145 at first. Tammy spent
57 of her money and Jane spent
45 of her money. Given that they had $44 left, how much did Tammy have at first?
|
Tammy |
Jane |
Total |
Before |
7 u |
5 p |
$145 |
Change |
- 5 u |
- 4 p |
|
After |
2 u |
1 p |
$44 |
7 u + 5 p = 145 --- (1)
2 u + 1 p = 44 --- (2)
(2) x 5 10 u + 5 p = 220 --- (3)
(3) - (1)
10 u - 7 u = 220 - 145
3 u = 75
1 u = 75 ÷ 3 = 25
Amount that Tammy had at first
= 7 u
= 7 x 25
= $175
Answer(s): $175