Jawabanmu

2014-01-16T14:09:37+07:00
-5x + x = 28
-4x = 28
-x=7
x = -7
1 5 1
2014-01-16T14:11:32+07:00
7-5x = 35-x
= -5x + x = 35 - 7
= -4x  = 28
= x   = 28/-4
=  x  = -7