Suppose that x ounces of a 25% acid solution are mixed with y ounces of a 35% solution to obtain 91 ounces of a 32% solution. One equation in a system for solving this problem is x + y = 91. Which of the following is the other equation? A) .35x + .25y = .32(91) B) 35x + 25y =32 C) 25x + 35y = .32(91) D) .25x + .35y=.32(91)