Tolong dong minta jawaban nomer 27 sampe 30,pake cara ya

27.
[tex] \frac{y - 3}{3 - 3} = \frac{x - 0}{3 - 0} \\ \frac{3y - 3}{x} = 0[/tex]
28. x=2y
x+y=-6
substitusikan:
* x+y=-6
2y+y=-6
3y=-6
y= -2
*x=2y
x=2(-2)
x= -4