Jawapan

2015-06-02T18:01:14+08:00
(12d + 1 = 6/d)(d)

12d² + d = 6

12d² + d - 6 = 0

(3d - 2)(4d + 3) = 0

d = 2/3,d = -3/4          x = d  jadi , x = 2/3,x = -3/4
2015-06-02T21:55:35+08:00
12d+1=6/d
12d^2+d=6
12d^2+d-6=0
do factorization and you will get the answer.
x=-3/4, x=2/3