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5 December, 09:11

3x - 5y = 17 y = - 7 Solve by substitution.

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  1. 5 December, 09:13
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    Substitute the value of y given by the second equation into the first.

    ... 3x - 5 (-7) = 17

    ... 3x + 35 = 17

    ... 3x = - 18

    ... x = - 6

    The solution is (x, y) = (-6, - 7).
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