Question 184934
3.92x+2.15(30-x)=2.80*30
3.92x+64.5-2.15x=84
1.77x=84-64.5
1.77x=19.5
x=19.5/1.77
x=11.017 lbs. of $3.92 candy is used.
30-11.017=18.983 lbs. of the cheap candy.
Proof:
3.92*11.017+2.15*18.983=84
43.1866+40.8136=84
84~84