math

posted by radilyn

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

  1. Collins

    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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