3x -2y = 1
2x 4y = 12

Jawaban:Jawaban 1[tex]x = \frac{7}{4} \\ y = \frac{17}{8} [/tex]Jawaban 2[tex]x = \frac{10}{3} \\ y = - \frac{9}{2} [/tex]Penjelasan dengan langkah-langkah:Itu yang bawah belum jelas ya kak + atau - nya, aku kerjain dua versi ya kak.Versi 1 [tex]3x - 2y = 1 \\ 2x + 4y = 12[/tex]Eliminasi persamaan [tex](3x - 2y = 1)\times 1\\ (2x + 4y = 12) \times 1 \\ \\ [/tex][tex]6x - 4y = 2 \\ 2x + 4y = 12 \\ = = = = = = = = = = + \\ 8x = 14 \\ x = \frac{14}{8} = \frac{7}{4} [/tex]Substitute nilai x ke salah satu persamaan [tex]2x + 4y = 12 \\ 2( \frac{7}{4} ) + 4y = 12 \\ \frac{7}{2} + 4y = 12 \\ 4y = 12 - \frac{7}{2} \\ 4y = \frac{24 - 7}{2} \\ 4y = \frac{17}{2} \\ y = \frac{17}{2} \div 4 \\ y = \frac{17}{2} \times \frac{1}{4} \\ y = \frac{17}{8} [/tex]Versi 2[tex]3x - 2y = 1 \\ 2x - 4y = 12[/tex]Eliminasi persamaan [tex](3x - 2y = 1) \times 2 \\ (3x - 4y = 12) \times 1[/tex][tex]6x - 4y = 2 \\ 3x - 4y = 12 \\ = = = = = = = = = = = - \\ 3x = - 10 \\ x = - \frac{10}{3} [/tex]Substitusi nilai x ke salah satu persamaan [tex]3x - 2y = 1 \\ 3( \frac{ - 10}{3} ) - 2y = 1 \\ - 10 - 2y = 1 \\ - 2y = 9 \\ y = - \frac{9}{2} [/tex]

Answered by Shervina | 2025-08-14