Question 221269
.57x+.37(200-x)=.49*200
.57x+74-.37x=98
.20x=98-74
.20x=24
x=24/.20
x=120 ml. of th 57% mixture is used.
200-120=80 ml of the 37% mixture is used.
Proof:
.57*120+.37*80=.49*200
68.4+29.6=98
98=98