Tentukan hp dari x-y-1=0

Ax + by = c

x – y – 1 = 0
x – y = 1

Jadi Koefisien x = 1
                       y = – 1
Konstanta = 1

X-y-1 = 0
x-y = 0+1
x-y = 1

utk x = 0 :
0-y = 1
-y = 1
y = -1
didapat (0,-1)

utk y = 0 :
x-0 = 1
x = 1+0
x = 1
didapat (1,0)