Quant Boosters - Quant Mixed Bag - Set 1


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    2xy - 3x - y = 4
    2x(y - 3/2) - y = 4
    add 3/2on both sides
    2x(y - 3/2) - y + 3/2 = 4 + 3/2
    2x(y - 3/2) - 1(y - 3/2) = 11/2
    (2x - 1)(y - 3/2) = 11/2
    (2x - 1)(2y - 3) = 11
    11 = 1 * 11
    Case-1) 2x - 1 = 1 => x=1
    2y - 3 = 11, y = 7
    Case-2) 2x - 1 = 11
    x = 6
    2y - 3 = 1, y = 2
    so 7/9


 

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