jika x=3x-2b-c, y=a+3b-c,z=2a+6b-c maka nilai dari 5x- 1 per2z-3y

[tex]x=3a-2b-c , y=a+3b-c, z=2a+6b-c [/tex]
[tex] \frac{5x-1}{2z-3y} = \frac{5(3a-2b-c)}{2(2a+6b-c) +3(a+3b-c)}[/tex]
[tex]= \frac{15a-10b-5c}{4a+12b-2c + 3a+9b-3c} = \frac{15a-10b-5c}{7a+21b-5c} [/tex]