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16 May, 10:11

Best Buy sells CDS and DVDS. Jose bought 3 CDs and 2 DVDs for $58. Lisbeth bought 1 CD and 4 DVDs for $46. Determine the selling price for each

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  1. 16 May, 13:17
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    CDs=c

    DVDs=d

    Jose 3c+2d=58

    Lisbeth c+4d=46

    Multiply lisbeth by 3

    Lisbeth 3c+12d=46

    Subtract

    3c+2d=58

    3c+12d=138

    0c-10d=-80

    Divide by - 10

    -10d=-80

    d=8

    Plug back into original equation (you can chose)

    c+4d=46

    c+4 (8) = 46

    c+32=46

    c=14

    CDs=$14. DVDs=$8
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