Vanessa had 18 more chocolate bars than Opal. Vanessa used
45 of her chocolate bars and Opal used
34 of her chocolate bars. In the end, Vanessa had 2 times as much as Opal. Find the number of chocolate bars that Opal had at first.
| |
Vanessa |
Opal |
Comparing Vanessa
and Parry at first |
18 more |
|
| Before |
5x2 =
10 u |
4 u |
| Change |
- 4x2 =
- 8 u |
- 3 u |
| After |
1x2 =
2 u |
1 u |
Comparing Vanessa
and Parry in the end |
2 u |
1 u |
The number of chocolate bars that Vanessa had in the end is repeated. Make the number of chocolate bars that Vanessa had in the end the same. LCM of 1 and 2 is 2.
Number of chocolate bars that Vanessa had more than Opal
= 10 u - 4 u
= 6 u
6 u = 18
1 u = 18 ÷ 6 = 3
Number of chocolate bars that Opal had at first
= 4 u
= 4 x 3
= 12
Answer(s): 12
