Copy center charges .08 per page for machine-fed copies and .20 per page for hand-fed copies. If Logan's bill for 80 copies of his script is 13.00
Let x be the number of machine copies
then 80-x must have been hand- fed copies
The total cost would be .08x + .2 (80-x)
But we know the total cost = 13
.08x + .2 (80-x) =13
Multiplying both sides by 100 to get rid of decimals gives
8x + 20 (80-x) =1300
8x + 1600 – 20x = 1300
-12x = -300
x= 300/12 = 25
There were 25 machine copies and 80-25 = 55 hand- fed copies
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