Joelle had $147 more than Mary. Joelle spent
38 of her money and Mary spent
45 of her money. In the end, Joelle had 4 times as much as Mary. Find the amount of money Mary had at first.
| |
Joelle |
Mary |
Comparing Joelle
and Mary at first |
$147 more |
|
| Before |
8x4 =
32 u |
5x5 =
25 u |
| Change |
- 3x4 =
- 12 u |
- 4x5 =
- 20 u |
| After |
5x4 =
20 u |
1x5 =
5 u |
Comparing Joelle
and Mary in the end |
4x5 =
20 u |
1x5 =
5 u |
The amount that Joelle had in the end is repeated. Make the amount that Joelle had in the end the same. LCM of 4 and 5 is 20.
Amount that Joelle had more than Mary
= 32 u - 25 u
= 7 u
7 u = 147
1 u = 147 ÷ 7 = 21
Amount that Mary had at first
= 25 u
= 25 x 21
= $525
Answer(s): $525
