There was an equal number of purple and white marbles in a bag at first. After 22 white marbles were taken out and 26 purple marbles were added into the bag, there was
17 as many white marbles as purple marbles. Find the number of white marbles in the bag at first.
|
Purple marbles |
White marbles |
Before |
7 u - 26 |
1 u + 22 |
Change |
+ 26 |
- 22 |
After |
7 u |
1 u |
The number of purple and white marbles in the bag is the same at first.
7 u - 26 = 1 u + 22
7 u - 1 u = 22 + 26
6 u = 48
1 u = 48 ÷ 6 = 8
Number of white marbles at first
= 1 u + 22
= 8 + 22
= 30
Answer(s)30