(yang ngasal tek gx tau gx usah jwb) jwbn yg bener {0, 2} pake cara eliminasi
Selesaikanlah persamaan 5x – 6y = -12 dan x + 2y = 4 dengan metode eliminasi
Penjelasan dengan langkah-langkah:
Eliminasi y
5x – 6y = -12 | × 1 | 5x – 6y = -12
x + 2y = 4 | × 3 | 3x + 6y = 12
__________+
8x = 0
x = 0/8
x = 0
Eliminasi x
5x – 6y = -12 | × 1 | 5x – 6y = -12
x + 2y = 4 | × 5 | 5x + 10y = 20
___________–
-16y = -32
y = -32/-16
y = 2
Pembuktian :
5x – 6y = -12
5(0) -6(2) = -12
0 – 12 = -12
x + 2y = 4
0 + 2(2) = 4
0 + 4 = 4
Materi : SPLDV
5x – 6y = 12
x + 2y = 4 [ x = – 2y + 4 ]
_________________/
5( – 2y + 4 ) – 6y = 12
– 10y + 20 – 6y = 12
– 16y = – 8
y = ½
()()()()()
x = – 2y + 4
x = – 2(½) + 4
x = – 1 + 4
x = 3
______________/
Result / Hasil :
x = 3 dan y = ½ => ( 3,½ )
Semoga bisa membantu