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two pair of shoes and four pairs of sock cost 109,and three pairs of shoes and five pairs of socks cost 160 .Find the cost of pair of the sock

  • math -

    Let the shoe be=p
    and the sock=q
    2p+4q=109...first statement
    3p+5q=160....second statement
    ..........
    (2p+4q=109)3
    (3p+5q=160)2
    6p+12q=327
    6p+10q=320
    ...................
    -2q=-7
    q=3.5

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