Riordan and Justin had an equal number of lollipops at first. Riordan and Justin ate 30 and 9 lollipops respectively. In the end, Justin has four times as many lollipops as Riordan. How many lollipops did each of them has at first?
| |
Riordan |
Justin |
| Before |
1 u + 30 |
4 u + 9 |
| Change |
- 30 |
- 9 |
| After |
1 u |
4 u |
Riordan and Justin had an equal number of lollipops at first.
4 u + 9 = 1 u + 30
4 u - 1 u = 30 - 9
3 u = 21
1 u = 21 ÷ 3 = 7
Number of lollipops that each of them had at first
= 1 u + 30
= 7 + 30
= 37
Answer(s): 37
