Answer:
80% of 20 is 16.
Step-by-step explanation:
Answer:
50 liters
Step-by-step explanation:
If x is the volume of 20% acid, then:
x (0.20) + 20 (0.45) = (x + 20) (0.30)
0.2x + 9 = 0.3x + 6
3 = 0.1x
x = 30
30 liters of 20% acid are needed, so there will be a total of 50 liters of 30% acid.
The sum of two numbers will be zero when you have the same number and one is positive and one is negative. For example 1 + -1= 0
The answer to your question would be y=35x+50
