Answer:
Explanation:
x ml of 26% saline solution mixed with 40 ml of 50% saline solution to obtain a 42% saline solution.
The amount of salt is same at the input and output:
- 0.26x + 0.5*40 = 0.42*(40 + x)
- 0.26x + 20 = 16.8 + 0.42x
- 0.42x - 0.26x = 20 - 16.8
- 0.16x = 3.2
- x = 3.2/0.16
- x = 20