Tammy spent
35 of her money on 7 correction tapes and 10 glues. The cost of one glue was twice the cost of one correction tape. She bought some more glues with
13 of her remaining money. How many glues did Tammy buy altogether?
7 correction tapes and
10 glues |
Remaining amount |
| 3x3 |
2x3 |
| |
More glues |
Left |
| |
1x2 |
2x2 |
| 9 p |
2 p |
4 p |
Cost of 1 correction tape = 1 u
Cost of 1 glue = 2 u
Cost of 7 correction tapes = 7 x 1 u = 7 u
Cost of 10 glues = 10 x 2 u = 20 u
Total cost of 7 correction tapes and 10 glues
= 7 u + 20 u
= 27 u
9 p = 27 u
1 p = 27 ÷ 9 = 3 u
Amount that Tammy used to buy more glues
= 2 p
= 2 x 3 u
= 6 u
Number of more glues that Tammy bought
= 6 u ÷ 2 u
= 3
Total number of glues that Tammy bought
= 10 + 3
= 13
Answer(s): 13
