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22 October, 12:52

Use elimination to solve this system of equations. 2r + 3s = 9 and 3r + 2s = 12

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  1. 22 October, 15:39
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    2r + 3s = 9 - 6r - 9s = - 27;

    3r + 2s = 12 6r + 4s = 24;

    => 0*r - 5*s = - 3 = > s = 3/5;

    2*r + 3 * (3/5) = 9 10*r + 9 = 45 10*r = 36 = > r = 18/5;
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