Hilda had $70 less than Risa. Risa spent
58 of her money and Hilda spent
23 of her money. In the end, Risa had 2 times as much as Hilda. Find the amount of money Risa had at first.
| |
Risa |
Hilda |
Comparing Risa
and Hilda at first |
$70 more |
|
| Before |
8x2 =
16 u |
3x3 =
9 u |
| Change |
- 5x2 =
- 10 u |
- 2x3 =
- 6 u |
| After |
3x2 =
6 u |
1x3 =
3 u |
Comparing Risa
and Hilda in the end |
2x3 =
6 u |
1x3 =
3 u |
The amount that Risa had in the end is repeated. Make the amount that Risa had in the end the same. LCM of 2 and 3 is 6.
Amount that Hilda had less than Risa
= 16 u - 9 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Amount that Risa had at first
= 16 u
= 16 x 10
= $160
Answer(s): $160
