Tentukan M agar y=2x-1 dan y= Mx+(M-5)x+8

2x-1=Mx+ (M-5)x +8
2x-1 = Mx + Mx-5x+8
2x-1 = 2Mx-5x +8
2x-1 = (2M-5)x +8

maka 2 = 2M-5
7/2 =M

y=2x-1 (misal y =1)
1=2x-1
2x=-1-1
2x=-2
X=-1
y=mx+(m-5)x+8
1=m(-1)+(m-5)-1+8
1=-m-m+5+8
1=-2m+13
-2m=13-1
-2m=12
m=12:-2
m=-6