Question 178201
Chocolate chip cookies are sold fo $6.95 per pound and white chocolate cookies for $5.95 per poud. How many pounds of chocolate chip cookies should be mixed with 4 pounds of white chocolate cookies to obtain a mixture that sells for $6.75 per pound? 
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Value Equation:
value + value = value 
6.95x + 5.95*4 = 6.75(x + 4)

Multiply thru by 100 to get:
695x + 595*4 = 675x + 675*4
20x = 80*4
x = 16 lbs (pounds of chocolate chip needed for the mixture)
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Cheers,
Stan H.