Tina had 15 more chocolate bars than Wendy. Tina used
45 of her chocolate bars and Wendy used
45 of her chocolate bars. In the end, Tina had 2 times as much as Wendy. Find the number of chocolate bars that Wendy had at first.
| |
Tina |
Wendy |
Comparing Tina
and Parry at first |
15 more |
|
| Before |
5x2 =
10 u |
5 u |
| Change |
- 4x2 =
- 8 u |
- 4 u |
| After |
1x2 =
2 u |
1 u |
Comparing Tina
and Parry in the end |
2 u |
1 u |
The number of chocolate bars that Tina had in the end is repeated. Make the number of chocolate bars that Tina had in the end the same. LCM of 1 and 2 is 2.
Number of chocolate bars that Tina had more than Wendy
= 10 u - 5 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Number of chocolate bars that Wendy had at first
= 5 u
= 5 x 3
= 15
Answer(s): 15
