The total amount, in liters, of a saline solution can be expressed as the liters of each type of saline solution multiplied by the percent of the saline solution. This gives 3(0.10),x(0.25), and (x+3)(0.15), where x is the amount, in liters, of a 25% saline solution and 10%,15%, and 25% are represented as 0.10,0.15, and 0.25, respectively. Thus, the equation 3(0.10)+0.25x=0.15(x+3) must be true. Multiplying 3 by 0.10 and distributing 0.15 to (x+3) yields 0.30+0.25x=0.15x+0.45. Subtracting 0.15x and 0.30 from each side of theequation gives 0.10x=0.15. Dividing each side of the equation by 0.10 yields x=1.5, or x=