Question 187777
10.50x+8.50(10-x)=93
10.50x+85-8.5x=93
2x=93-85
2x=8
x=8/2
x=4 of the $10.50 discs were bought.
10-4=6 oc the $ 8.50 discs were bought.
Proof:
10.50*4+8.50*6=93
42+51=93
93=93