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A manufacturer produces three types of radios: deluxe, standard and economy. Each radio uses three different types of transistors: P, Q and R. The deluxe radio uses 2 P's, 7 Q's and 1 R. The standard contains 2 P's, 3 Q's and 1 R, and the economy model requires 1 P, 2 Q's and 2 R's.

How many radios of each type can be constructed if the total number of transistors (P's, Q's and R's) available are 2200, 3400 and 1400 respectively and all transistors must be used?

  • math - ,

    P equation:
    2D+2S+E=2200
    Q equation:
    7D+3S+2E=3400
    R equation:
    D+S+2E=1400

    solving

    I get Deluxe radios: zero
    Standard radios:1000
    Economy: 200

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