Flynn has a total of 44 of white and silver staplers.
15 of the white staplers and half of the silver staplers are new. How many of his silver staplers are new if he has a total of 13 new staplers?
| |
White staplers |
Silver staplers |
Total |
| Total |
5 u |
2 p |
44 |
| New |
1 u |
1 p |
13 |
| Old |
4 u |
1 p |
31 |
Number of old staplers
= 44 - 13
= 31
1 u + 1 p = 13 --- (1)
4 u + 1 p = 31 --- (2)
(2) - (1)
(4 u + 1 p) - (1 u + 1 p) = 31 - 13
4 u - 1 u = 18
3 u = 18
1 u = 18 ÷ 3 = 6
Number of new silver staplers
= 13 - 1 u
= 13 - 6
= 7
Answer(s): 7
