Jawabanmu

2014-02-25T20:41:43+07:00
X = 3

-2x+7 = 2 x 3 + 7 = 13
-5x-11 = 5 x 3 - 11 = 4

= 13-4 = C.9 (Mungkin)
2014-02-25T20:45:43+07:00
2x+7=5x-11
2x-5x= -11-7
-3x  = -18
 x = -18:-3
 x= 6

maka x+3=
         6+3=9 (c)