Question 179230
let A=liters of A, and B=liters of B


A+B = 6000, so A = 6000-B


A(.857) + B(1.72) = 6000(1.05)


substituting from 1st eqn. to 2nd eqn.  __  (6000-B)(.857) + B(1.72)=6000(1.05)


5142 - .857B + 1.72B = 6300


subtracting 5142 __ .863B = 1158


dividing by .863  __  B = 1342L (approx)


A = 6000 - 1342 = 4658L (approx)