jika 3x +3y =3 dan 2x +4y= 14 tentukan nilai dari 2x -y=???

3x + 3y = 3
x + y = 1

2x + 4y = 14
x + 2y = 7

Eliminasi
x + y = 1
x + 2y = 7
________-
-y = -6
y = 6

Subtitusi
x + y = 1
x = 1 - 6
x = -5

= 2x - y
= 2(-5) - 6
= -10 - 6
= -16

semoga berguna