Ivory collected 3 times as many stickers as Riordan. After Riordan collected another 120 stickers, both of them had an equal number of stickers. How many stickers did Ivory collect?
| |
Ivory |
Riordan |
| Before |
3 u |
1 u |
| Change |
|
+ 120 |
| After |
3 u |
1 u + 120 |
The number of stickers that Ivory and Riordan collected in the end is equal.
3 u = 1 u + 120
3 u - 1 u = 120
2 u = 120
1 u = 120 ÷ 2 = 60
Number of stickers that Ivory collected
= 3 u
= 3 x 60
= 180
Answer(s): 180
