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16 April, 01:54

Solve the system:

5y+8 (x-3y) = 7x-12

9x+3 (x-9y) = 11y+46

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  1. 16 April, 03:08
    0
    5y+8 (x-3y) = 7x-12

    5y+8x-24y=7x-12

    8x-7x + 5y-24y = - 12

    X - 19y = - 12

    9x+3 (x-9y) = 11y+46

    9x+3x - 27y = 11y + 46

    12x - 27y - 11y = 46

    12x - 38y = 46

    Now joining together

    X - 19y = - 12

    12x - 38y = 46

    Multiple by 12 the first equation and Substract after

    12x - 228y = - 144

    12x - 38y = 46

    - 190y = - 98

    Y = 1.9

    12x - 38y = 46

    12x - 38 (1.9) = 46

    12x - 73.67 = 46

    12x = 46 + 73.67

    12x = 119.67

    X = 9.97

    So the answer are:

    X = 9.97

    Y = 1.9
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