A company manufacture two different types of call phone F and E , each unit of call phone S costs (D + 6) OR and each unit of call phone E costs (M + 4) OR. The company insists that total costs for the two types call phone be 400 OR. Assuming that company manufactures in total (N+80) products. How many products are of type Fand E? (solve the problem using Crammer's Rule)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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A company manufacture two different types of call phone F and E , each unit of call phone S costs (D + 6) OR and each unit of call phone E costs (M + 4) OR. The company insists that total costs for the two types call phone be 400 OR. Assuming that company manufactures in total (N+80) products. How many products are of type Fand E? (solve the problem using Crammer's Rule)

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