Warren and Tim have a total of 68 pens. If Warren gives Tim 20 pens, Tim will have 3 times as many pens as him. Find
(a) Warren's pens
(b) Tim's pens
|
Warren |
Tim |
Total |
Before |
1 u + 20 |
3 u - 20 |
68 |
Change |
- 20 |
+ 20 |
|
After |
1 u |
3 u |
4 u |
(a)
Total number of pens
= 1 u + 3 u
= 4 u
4 u = 68
1 u = 68 ÷ 4 = 17
Number of pens that Warren has
= 1 u + 20
= 17 + 20
= 37
(b)
Number of pens that Tim has
= 68 - 37
= 31
Answer(s): (a) 37; (b) 31