Irene had $86 less than Tammy. Tammy spent
25 of her money and Irene spent
56 of her money. In the end, Tammy had 4 times as much as Irene. Find the amount of money Tammy had at first.
| |
Tammy |
Irene |
Comparing Tammy
and Irene at first |
$86 more |
|
| Before |
5x4 =
20 u |
6x3 =
18 u |
| Change |
- 2x4 =
- 8 u |
- 5x3 =
- 15 u |
| After |
3x4 =
12 u |
1x3 =
3 u |
Comparing Tammy
and Irene in the end |
4x3 =
12 u |
1x3 =
3 u |
The amount that Tammy had in the end is repeated. Make the amount that Tammy had in the end the same. LCM of 4 and 3 is 12.
Amount that Irene had less than Tammy
= 20 u - 18 u
= 2 u
2 u = 86
1 u = 86 ÷ 2 = 43
Amount that Tammy had at first
= 20 u
= 20 x 43
= $860
Answer(s): $860
