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Algebra

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The cost of 5 similar cameras and 3 similar video cameras is $3,213. Each video camera costs 4 times as much as each digital camera. John buys a digital camera and a video camera. How much does he pay?

  • Algebra -

    cost of digital camera --- x
    cost of video camera ---- 4x

    5x + 3(4x) = 3213
    17x = 3213
    x = 189

    so digital + video
    = x + 4x
    = 5x
    = 945

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