Flynn had
35 as many buttons as Risa. After Flynn gave away 42 buttons, he had 68 less buttons than Risa. How many buttons did Risa have?
| |
Flynn |
Risa |
| Before |
3 u |
5 u |
| Change |
- 42 |
|
| After |
3 u - 42 |
5 u |
Risa had 68 more buttons than Flynn in the end. So, if Flynn had another 68 buttons, he would have the same number of buttons as Risa.
5 u = 3 u - 42 + 68
5 u - 3 u = 68 - 42
2 u = 26
1 u = 26 ÷ 2 = 13
Number of buttons that Risa had at first
= 5 u
= 5 x 13
= 65
Answer: 65
