Question 605721
The manager of a farmer's market has 250 lb of grain that costs $1.40 per pound. How many pounds of meal costing $0.80 per pound should be mixed with the 250 lb of grain to produce a mixture that costs $1.05 per pound? 
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Let x = amount (lbs) of $0.80 per pound meal added
then
.80x + 1.40(250) = 1.05(250+x)
.80x + 350 = 262.50 + 1.05x
350 = 262.50 + 0.25x
87.5 = 0.25x
350 lbs = x