Elyse had a total of 46 pieces of $100 and $10 notes at first. She spent
38 of the number of $100 notes and received another 6 pieces of $10 notes from her mother. After that, the number of $10 notes she had was
12 of the remaining notes. How much money did Elyse have at first?
|
$100 |
$10 |
Total |
Before |
8 u |
5 u - 6 |
46 |
Change |
- 3 u |
+ 6 |
|
After |
5 u |
|
|
Comparing $100-notes and $10-notes |
1x5 = 5 u |
1x5 = 5 u |
|
The number of $100-notes and $10-notes in the end is the same.
The number of $100-notes in the end is repeated. Make the number of $100-notes in the end the same. LCM of 1 and 5 is 5.
Number of notes at first
= 8 u + 5 u - 6
= 13 u - 6
13 u - 6 = 46
13 u = 46 + 6
13 u = 52
1 u = 52 ÷ 13 = 4
Number of $100-notes at first
= 8 u
= 8 x 4
= 32
Total value of $100-notes at first
= 32 x 100
= $3200
Number of $10-notes at first
= 5 u - 6
= 5 x 4 - 6
= 20 - 6
= 14
Total value of $10-notes at first
= 14 x 10
= $140
Amount that Elyse had at first
= 3200 + 140
= $3340
Answer(s): $3340