Gillian had 104 less chocolate bars than Jen. Jen used
45 of her chocolate bars and Gillian used
12 of her chocolate bars. In the end, Jen had 3 times as much as Gillian. Find the number of chocolate bars that Jen had at first.
| |
Jen |
Gillian |
Comparing Jen
and Parry at first |
|
104 less |
| Before |
5x3 =
15 u |
2 u |
| Change |
- 4x3 =
- 12 u |
- 1 u |
| After |
1x3 =
3 u |
1 u |
Comparing Jen
and Parry in the end |
3 u |
1 u |
The number of chocolate bars that Jen had in the end is repeated. Make the number of chocolate bars that Jen had in the end the same. LCM of 1 and 3 is 3.
Number of chocolate bars that Gillian had less than Jen
= 15 u - 2 u
= 13 u
13 u = 104
1 u = 104 ÷ 13 = 8
Number of chocolate bars that Jen had at first
= 15 u
= 15 x 8
= 120
Answer(s): 120
