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21 June, 10:48

7x-4y=-8 and y=3/4x-3

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  1. 21 June, 11:12
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    7x-4y=-8 ... (i)

    y=3/4x-3 ... (ii)

    Putting the value of y in eqn (i)

    7x-4y=-8

    or, 7x-4 (3/4x-3) = -8

    or, 7x-3x+12=-8

    or, 4x=-8-12

    or, x=-20/4

    x=-5

    again,

    putting the value of x in eqn (ii)

    y=3/4x-3

    y=-5 (3/4) - 3

    y=-15/4 - 3

    y=-3/4

    x=-5

    y=-3/4
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