Use a system of equations to solve this problem. a chemist currently has two solutions of sodium chloride. one solution has a 5% concentration and the other has a 25% concentration. the chemist needs to make 10 l of a 10% sodium chloride solution. let x = the amount of 5% solution. let y = the amount of 25% solution. how much of each solution does the chemist need to make? enter your answers, as decimals, in the boxes.