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)