Jawabanmu

2014-02-27T20:07:28+07:00
1. -10+3(4-3X)=2(X+2)-10
5-12+9X = 2X+4-10
9X-2X + -10+4+12-5
7X = 1
X = 1/7

2.-4(3X-2)+38-2X
-12X+8 = 38-2X
-12+2X = 38-8
-10X=30
X=30/-10
X=-3
2014-02-27T20:14:02+07:00
2x - 1 = 5
     2x = 5+1
     2x = 6
      x  = 3

3x + 12 = 7x - 8
3x-7x    = -8-12
-4x        = -20
x           = 5