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Matematika
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1 Jawaban
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1. Jawaban atiz
[tex] \frac{x + 1}{y - 2} = \frac{3}{5} \\ 5(x + 1) = 3(y - 2) \\ 5x + 5 = 3y - 6 \\ 5x - 3y = - 11 \\ \frac{y + 1}{x + 2} = 2 \\ y + 1 = 2(x + 2) \\ y + 1 = 2x + 4 \\ - 2x + y = 3 \\ \\ eliminasi \\ 5x - 3y = - 11 | \times 1| 5x - 3y = - 11\\ - 2x + y = 3 | \times 3| - 6x + 3y = 9 \: \: + \\ - x = - 2 \\ x = 2 \\ \\ subst \\ - 2x + y = 3 \\ - 2(4) + y = 3 \\ y = 3 + 8 = 11[/tex]