Bobby had a total of 186 yellow and gold stars. After giving away
47 of the yellow stars and 66 gold stars, there was an equal number of yellow and gold stars left. How many yellow stars did he have at first?
|
Yellow stars |
Gold stars |
Total |
Before |
7 u |
3 u + 66 |
186 |
Change |
- 4 u |
- 66 |
|
After |
3 u |
3 u |
|
Total number of stars at first
= 7 u + 3 u + 66
= 10 u + 66
10 u + 66 = 186
10 u = 186 - 66
10 u = 120
1 u = 120 ÷ 10 = 12
Number of yellow stars that Bobby had at first
= 7 u
= 7 x 12
= 84
Answer(s): 84