How many liters each of a 35% acid solution and a 85% acid solution must be used to produce 90 liters of a 60% acid solution? (Round to two decimal places if necessary.)
Let the number of Liters of 35% solution needed =T
The number of Liters of 85% solution needed =90 - T
0.35T + 0.85[90 - T] =0.60 * 90, solve for T
T = 45 Liters of 35% acid solution will be needed
90 - 45 = 45 Liters of 85% acid solution will be needed.
