There was an equal number of green and brown balls in a bag at first. After 30 brown balls were taken out and 26 green balls were added into the bag, there was
18 as many brown balls as green balls. Find the number of brown balls in the bag at first.
|
Green balls |
Brown balls |
Before |
8 u - 26 |
1 u + 30 |
Change |
+ 26 |
- 30 |
After |
8 u |
1 u |
The number of green and brown balls in the bag is the same at first.
8 u - 26 = 1 u + 30
8 u - 1 u = 30 + 26
7 u = 56
1 u = 56 ÷ 7 = 8
Number of brown balls at first
= 1 u + 30
= 8 + 30
= 38
Answer(s)38