Question 902590
0.008*x+0.015*400=0.0136(400+x)
0.008*x+6.0=5.44+0.0136x
0.008x-0.0136x=5.44-6.0
-0.0056x=-0.56
x=100.0 lbs of $0.80 is added to 400 lbs of 1.50 to get  500.0 lbs  at $1.36



check
0.008*100.0+0.015*400=0.0136(400+100.0)
0.8+6.0=0.0136(500.0)
6.8=6.8
ok