Question 1133340
x=0.30 mixture y=0.80 mixture
x+y=6
y=(6-x)
.30x+.80(6-x)=6(.70), pure sugar equation
.30x+4.8-0.80x=4.20
-.50x=-.60
x=1.2 liters of 30% and 6-x or y=4.8 liters of 80%.

check 70% is 4/5 of the way between 30% and 80%
want 4/5 of the 80% and 1/5 of the 30%