jika titik A(6, 4, -2), B(4, 3, x), dan C(0, q, 10) segaris, nilai x = tolongg yaaa, mau di kumpul plissssss

VEKTOR 
Kelas :X

AB = k.AC

AB = <-2,-1,x+2>
AC = <-6,-3,12>

<-2,-1,x+2> = k<-6,-3,12>
<-2,-1,x+2> = <-6k,-3k,12k>
-2 = -6k
k = 1/3

x+2 = 12(1/3)
x+2 = 4
x = 2