Flynn has a total of 52 of yellow and brown markers.
13 of the yellow markers and half of the brown markers are new. How many of his brown markers are new if he has a total of 20 new markers?
| |
Yellow markers |
Brown markers |
Total |
| Total |
3 u |
2 p |
52 |
| New |
1 u |
1 p |
20 |
| Old |
2 u |
1 p |
32 |
Number of old markers
= 52 - 20
= 32
1 u + 1 p = 20 --- (1)
2 u + 1 p = 32 --- (2)
(2) - (1)
(2 u + 1 p) - (1 u + 1 p) = 32 - 20
2 u - 1 u = 12
1 u = 12
1 u = 12 ÷ 1 = 12
Number of new brown markers
= 20 - 1 u
= 20 - 12
= 8
Answer(s): 8
