3) Set up, but do not solve, a system of equations for the following application: How many liters of a 36% saline solution and how many liters of a 52% saline solution should be mixed to obtain 125 liters of a 45% saline solution?

A chemist has three different acid solutions. The first acid solution contains 20%20% acid, the second contains 40%40% and the third contains 70%70%. They want to use all three solutions to obtain a mixture of 180180 liters containing 30%30% acid, using 22 times as much of the 70%70% solution as the 40%40% solution. How many liters of each solution should be used?

Solve the following system of equations by using the method of elimination by equating the coefficients: 10 +1=15. +一=15 %3D 8 6.