Luke has a total of 48 of yellow and blue markers.
14 of the yellow markers and half of the blue markers are new. How many of his blue markers are new if he has a total of 13 new markers?
|
Yellow markers |
Blue markers |
Total |
Total |
4 u |
2 p |
48 |
New |
1 u |
1 p |
13 |
Old |
3 u |
1 p |
35 |
Number of old markers
= 48 - 13
= 35
1 u + 1 p = 13 --- (1)
3 u + 1 p = 35 --- (2)
(2) - (1)
(3 u + 1 p) - (1 u + 1 p) = 35 - 13
3 u - 1 u = 22
2 u = 22
1 u = 22 ÷ 2 = 11
Number of new blue markers
= 13 - 1 u
= 13 - 11
= 2
Answer(s): 2