penyelesaian sistem persamaan 5x +2y =-10 dan x _3y=-19
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Jawaban:
[tex]5x + 2y = - 10 \: ( \times 1) \\ x - 3y = - 19 \: ( \times 5) \\ - - - - - - - - - - - - - - - - \\ 5x + 2y = - 10 \\ 5x - 15y = - 95 \\ - - - - - - - - - - - - - - - - \\ 17y = 85 \\ y = \frac{85}{17} = 5 \\ \\ x - 3y = - 19 \\ x - 3(5) = - 19 \\ x = - 19 + 15 = - 4[/tex]
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