Tammy had
35 as much money as Risa. Tammy received another $99 from her friend. In the end, Tammy's money became 1
12 of what Risa had. How much did Tammy have at first?
| |
Tammy |
Risa |
| Before |
3x2 =
6 u |
5x2 =
10 u |
| Change |
+ $99 |
|
| After |
3x5 =
15 u |
2x5 =
10 u |
1
12 =
32The amount that Risa had at first and in the end remains unchanged. Make the amount that Risa had the same. LCM of 2 and 5 is 10.
Amount that Tammy received
= 15 u - 6 u
= 9 u
9 u = 99
1 u = 99 ÷ 9 = 11
Amount that Tammy had at first
= 6 u
= 6 x 11
= $66
Answer(s): $66
