1. X + 2y = -1 3x - 4y =272. -2x + y =2 3x + 2y=-10bantu jawab bang persamaan linier 2 variabel menggunakan metode subsitusi serta langkah-langkah jawabanya.​

Metode substitusi [tex]1).x + 2y = - 1 \\ x = - 2y - 1 \\ \\ Nilai \: y \\ 3x - 4y = 27 \\ 3( - 2y - 1) - 4y = 27 \\ - 6y - 3 - 4y = 27 \\ - 10y = 27 + 3 \\ - 10y = 30 \\ \: \: \: \: \: \: \: \: \: \: y = - 3 \\ \\ Nilai \: x \\ x = - 2y - 1 \\ x = - 2( - 3) - 1 \\ 6 - 1 \\ 5 \\ HP = (5, - 3) \\ \\ 2). - 2x + y = 2 \\ y = 2x + 2 \\ \\ Nilai \: x \\ 3x + 2y = - 10 \\ 3x + 2(2x + 2) = - 10 \\ 3x + 4x + 4 = - 10 \\ 7x = - 10 - 4 \\ 7x = - 14 \\ x = - 2 \\ \\ Nilai \: y \\ y = 2x + 2 \\ y = 2( - 2) + 2 \\ y = - 4 + 2 \\ y = - 2 \\ HP = ( - 2, - 2)[/tex]

Answered by dεωιρω | 2025-08-04