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21 July, 00:45

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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  1. 21 July, 01:51
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    217x + 131y = 913

    131x + 217y = 827

    131*I - 217*II

    131 * (217x + 131y) - 217 * (131x + 217y) = 131*913 - 217*827

    28427·x + 17161·y - 28427·x - 47089·y = - 59856

    - 29928·y = - 59856

    y = 2

    217x + 131*2 = 913 - -> x = 3
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