tolong bantu nomor 18 ya

h: 3y + 6x - 5 = 0
    3y = -6x + 5
      y = -2x + (5/3)

gradien garis h = -2 ..........(m1)

gradien tegak lurus = m2

m1 x m2 = -1
-2 x m2 = -1
m2 = -1/-2
       = 1/2

y = 1/2 x + c
-2 = 1/2 (4) + c
-2 = 2 + c
c = -2 - 2
   = -4

y   = 1/2x - 4
2y = x - 8
x  - 2y - 8 = 0   (B)