Jawabanmu

2014-06-08T16:38:36+07:00
2(x+7)-3(2x-1)=4(x+7)-10x+5
2x+14-6x+3=4x+28-10x+5
2x-6x-4x+10x=28+5-14-3
2x=16
x=8
jadi,2(x-12)=2(8-12)
=2(-4)
= -8 (b)
2014-06-08T16:43:07+07:00
2(x+7)-3(2x-1)=4(x+7)-10x+5
2x+14-6x+3  =4x+28-10x+5
-4x+17= -6x+33
-4x+6x =33-17
2x=16
x=16/2
  =8


ditanya ;
2(X-12)
=2(8-12)
=16-24
= -8

JAWABAN NYA  B. -8