Some notebooks and markers were packed into white and red bags. There were 4 more white bags than red bags. Each white carton contained 9 notebooks and each red carton contained 16 markers. Given that there were 13 fewer notebooks than markers in total, how much notebooks were there?
| |
Notebooks in
white bags |
Markers in
red bags |
Difference |
| Number |
1 u + 4 |
1 u |
|
| Value |
9 |
16 |
|
| Total value |
9 u + 36 |
16 u |
13 |
Number of fewer notebooks than markers
= 16 u - (9 u + 36)
= 16 u - 9 u - 36
= 7 u - 36
7 u - 36 = 13
7 u = 36 + 13
7 u = 49
1 u = 49 ÷ 7 = 7
Total number of notebooks
= 9 u + 36
= 9 x 7 + 36
= 63 + 36
= 99
Answer(s): 99
