Jawabanmu

2014-02-10T16:53:35+07:00
-4X-15=1-8X
-4X+8X=1+15
4X=16
X=16/4
X=4 JD, HP {4}
2014-02-10T16:55:50+07:00
-4x - 15=1-8x=
⇔-4x+8x = 1+15
⇔4x = 16
⇔x=16/4
⇔x=4
HP  (4)