Question 95884
.4X+.8(100-X)=.6*100
.4X+80-.8X=60
-.4X=60-80
-.4X=-20
X=-20/-.4
X=50 POUNDS OF 40% ARE NEEDED.
100-50=50 POUNDS OF 80% IS NEEDED.
PROOF
.4*50+.8*50=.6*100
20+40=60
60=60