Tiffany collected 3 times as many buttons as Cole. After Cole collected another 80 buttons, both of them had an equal number of buttons. How many buttons did Tiffany collect?
| |
Tiffany |
Cole |
| Before |
3 u |
1 u |
| Change |
|
+ 80 |
| After |
3 u |
1 u + 80 |
The number of buttons that Tiffany and Cole collected in the end is equal.
3 u = 1 u + 80
3 u - 1 u = 80
2 u = 80
1 u = 80 ÷ 2 = 40
Number of buttons that Tiffany collected
= 3 u
= 3 x 40
= 120
Answer(s): 120
