Jawabanmu

2014-09-11T12:11:18+07:00
Contoh soal -5 l x- 7 l + 2 = -13
caranya
-5 l x - 7 l = 2 = -13
-5 l x - 7 l = -15
l x - 7 l = 3
x-7 = 3 atau x- 7 = -3
   x= 4              x = 10