math

posted by wesley

The following simultaneous equations are given in base two 11x + 10y = 1100
101x - y =111
Find the value of x and y

  1. Reiny

    multiply the 2nd by 10
    1010x - 10y = 1110
    add to the first

    1010x - 10y = 1110
    11x + 10y = 1100
    ...............................
    1101x = 11010
    x = 10

    in the 1st
    110 +10y = 1100
    10y = 1100-110 = 110
    y = 11

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