Archie and Tim had a total of 199 buttons at first. After Archie bought 28 more buttons and Tim gave away 15 buttons, Archie now has the same number of buttons as Tim. How many buttons did Archie have at first?
|
Archie |
Tim |
Total |
Before |
1 u - 28 |
1 u + 15 |
199 |
Change |
+ 28 |
- 15 |
|
After |
1 u |
1 u |
212 |
Total number of buttons in the end
= 199 + 28 - 15
= 212
2 u = 212
1 u = 212 ÷ 2 = 106
Number of buttons that Archie had in the end
= 1 u
= 106
Number of buttons that Archie had at first
= 106 - 28
= 78
Answer(s): 78