SOLUTION: An inventory of two types of floodlights showed a total of 60 lights valued at $2580. If Type A cost $40 each while Type B cost $50 each, how many Type B floodlights were in invent

Question 1097895: An inventory of two types of floodlights showed a total of 60 lights valued at $2580. If Type A cost $40 each while Type B cost $50 each, how many Type B floodlights were in inventory?
For this problem, set up an equation in one unknown and solve.
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
Let
B = number of type B lights
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Compute value of lights: $40*(number type A) + $50*(number type B) = $2580
and number of type A is 60-B:
40(60-B) + 50B = 2580
2400 - 40B + 50B = 2580
10B = 180

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Check:
40(60-B)+50B = 40(42) + 50(18) = 1680 + 900 = 2580

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