Dik x - 3y - 5 = 0 dan 2x - 5y = 9. Nilai dari 3x + 2y adalah..

[tex] \: \: x - 3y = 5 \: \: \: \: | \times 2| \\ 2x - 5y = 9 \: \: \: \: | \times 1| \\ \\ 2x - 6y = 10 \\ 2x - 5y = 9[/tex]
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[tex] - y = 1 \\ y = - 1[/tex]

[tex]x - 3y = 5 \\ x - 3 \times - 1 = 5 \\ x - ( - 3) = 5 \\ x + 3 = 5 \\ x = 5 - 3 \\ x = 2[/tex]

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[tex]3x + 2y \\ = 3 \times 2 + 2 \times - 1 \\ = 6 + ( - 2) \\ = 6 - 2 \\ = 4[/tex]