Kathy had 143 less lollipops than Risa. Risa used
78 of her lollipops and Kathy used
23 of her lollipops. In the end, Risa had 2 times as much as Kathy. Find the number of lollipops that Risa had at first.
| |
Risa |
Kathy |
Comparing Risa
and Parry at first |
|
143 less |
| Before |
8x2 =
16 u |
3 u |
| Change |
- 7x2 =
- 14 u |
- 2 u |
| After |
1x2 =
2 u |
1 u |
Comparing Risa
and Parry in the end |
2 u |
1 u |
The number of lollipops that Risa had in the end is repeated. Make the number of lollipops that Risa had in the end the same. LCM of 1 and 2 is 2.
Number of lollipops that Kathy had less than Risa
= 16 u - 3 u
= 13 u
13 u = 143
1 u = 143 ÷ 13 = 11
Number of lollipops that Risa had at first
= 16 u
= 16 x 11
= 176
Answer(s): 176
