Tolong bantuin buat pr ya tentukan persamaan linear 2 variabel menggunakan metode eleminasi berikut ini 1.x+y=10 dan x -y=2 2. X-y=6 dan 2x+y=18 Bantuin ya,mksih
muhammadrofiq66
1). eliminasi : x+y = 10 x -y = 2 - 2y = 8 y = 8/2 y = 4
subtitusi : x-y = 2 x-4 = 2 x = 2+4 x = 6
jadi nilai x= 6 dan y=4
2). eliminasi : x - y = 6 | 2 | 2x -2y = 12 2x +y= 18 | 1 | 2x +y = 18 - -3y = -6 y = -6/-3 y = 2 subtitusi : x - y = 6 x - 2 = 6 x = 6+2 x = 8
x+y = 10
x -y = 2 -
2y = 8
y = 8/2
y = 4
subtitusi :
x-y = 2
x-4 = 2
x = 2+4
x = 6
jadi nilai x= 6 dan y=4
2). eliminasi :
x - y = 6 | 2 | 2x -2y = 12
2x +y= 18 | 1 | 2x +y = 18 -
-3y = -6
y = -6/-3
y = 2
subtitusi :
x - y = 6
x - 2 = 6
x = 6+2
x = 8
Jadi nilai x= 8 dan y= 2
x-y =2 2x+y=18
----------------- + ---------------- +
2x = 12 3x = 24
x = 6 x = 8
x+y = 10 x - y = 6
6 + y = 10 8 - y = 6
y= 4 -y = -2
y = 2