Roshel had 90 less chocolate bars than Wendy. Wendy used
45 of her chocolate bars and Roshel used
12 of her chocolate bars. In the end, Wendy had 4 times as much as Roshel. Find the number of chocolate bars that Wendy had at first.
| |
Wendy |
Roshel |
Comparing Wendy
and Parry at first |
|
90 less |
| Before |
5x4 =
20 u |
2 u |
| Change |
- 4x4 =
- 16 u |
- 1 u |
| After |
1x4 =
4 u |
1 u |
Comparing Wendy
and Parry in the end |
4 u |
1 u |
The number of chocolate bars that Wendy had in the end is repeated. Make the number of chocolate bars that Wendy had in the end the same. LCM of 1 and 4 is 4.
Number of chocolate bars that Roshel had less than Wendy
= 20 u - 2 u
= 18 u
18 u = 90
1 u = 90 ÷ 18 = 5
Number of chocolate bars that Wendy had at first
= 20 u
= 20 x 5
= 100
Answer(s): 100
