Looks like B to me. A and C both have 42x, but we know x is 38% solution.
Choice B says that the total acid in x liters + y liters is 39% of the resulting 100 Liters.
Suppose that X liters of 38% acid solution are mixed with y liters of a 42% solution to obtain 100L of a 39% solution. One equation in a system for solving this problem is x+y=100. Which one of the following is the other equation? A. 42x+38y=0.39*100 B 0.38x+0.42y=0.39*100 C. 0.42x+0.38y=0.39*100 D. 38x+42y=39
1 answer
1 answer