Raeann spent
34 of her money on 10 notebooks and 7 pens. The cost of each pen is 2 times the cost of each notebook. She bought some more notebooks with
78 of her remaining money. How many notebooks did Raeann buy altogether?
| 10 notebooks + 7 pens |
Remaining
amount |
Total
amount |
| 3 p = 24 u |
1 p = 8 u |
4 p |
10
notebooks |
7
pens |
More notebooks |
Left |
|
| |
|
7 |
1 |
|
| 10 u |
14 u |
7 u |
|
|
Cost of 1 notebook = 1 u
Cost of 1 pen = 2 u
Cost of 10 notebooks = 10 x 1 u = 10 u
Cost of 7 pens = 7 x 2 u = 14 u
Cost of 10 notebooks + 7 pens
= 10 u + 14 u
= 24 u
3 p = 24 u
1 p = 24 u ÷ 3 = 8 u
Amount of remaining money that Raeann spent on buying more notebooks
=
78 x 8 u
= 7 u
Number of notebooks that Raeann bought with
78 of her remaining money
= 7 u ÷ 1 u
= 7
Total number of notebooks that Raeann bought
= 10 + 7
= 17
Answer(s): 17
