Posted by Jim on Monday, September 14, 2009 at 12:05am.
Let C = weight cashews.
30(1.50) + 5.00*C = (30+C)(3.00)
Let C be the # of pounds of cashews and 30 be the # of pounds of peanuts.
$3 times the total number of lb. equals the sum of the costs of separate purchases of peanuts and cashews.
(C + 30)* 3 = 5 C + 1.50*30 = 5C + 45
Solve for C
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