Andy and Glen have a total of 85 erasers. If Andy gives Glen 15 erasers, Glen will have 4 times as many erasers as him. Find
(a) Andy's erasers
(b) Glen's erasers
|
Andy |
Glen |
Total |
Before |
1 u + 15 |
4 u - 15 |
85 |
Change |
- 15 |
+ 15 |
|
After |
1 u |
4 u |
5 u |
(a)
Total number of erasers
= 1 u + 4 u
= 5 u
5 u = 85
1 u = 85 ÷ 5 = 17
Number of erasers that Andy has
= 1 u + 15
= 17 + 15
= 32
(b)
Number of erasers that Glen has
= 85 - 32
= 53
Answer(s): (a) 32; (b) 53