Gillian had 49 less jelly beans than Risa. Risa used
56 of her jelly beans and Gillian used
45 of her jelly beans. In the end, Risa had 2 times as much as Gillian. Find the number of jelly beans that Risa had at first.
| |
Risa |
Gillian |
Comparing Risa
and Parry at first |
|
49 less |
| Before |
6x2 =
12 u |
5 u |
| Change |
- 5x2 =
- 10 u |
- 4 u |
| After |
1x2 =
2 u |
1 u |
Comparing Risa
and Parry in the end |
2 u |
1 u |
The number of jelly beans that Risa had in the end is repeated. Make the number of jelly beans that Risa had in the end the same. LCM of 1 and 2 is 2.
Number of jelly beans that Gillian had less than Risa
= 12 u - 5 u
= 7 u
7 u = 49
1 u = 49 ÷ 7 = 7
Number of jelly beans that Risa had at first
= 12 u
= 12 x 7
= 84
Answer(s): 84
