x = 5 jadi x + 2 = 5 + 2 = 7, hasilnya 7
X=5 jadi, x+2= 5+2 =7
3x + 12 = 7x - 8
3x - 7x = -8 -12
-4x = -20
x = 20/4
x = 5
jadi, x + 2 = 5 + 2 = 7
3x +12 = 7x - 8
3x+12=7x-8 3x+12-12 =7x-8-12 3x=7x-20 3x-7x=7x-7x-20 -4x=-20 -20/-4=5 ( x = 5 ) x+2=5+2=7

Jawabanmu

2014-02-17T19:55:25+07:00
2014-02-17T19:55:33+07:00
3x+12=7x-8
3x-7x=-8-12
-4x=-20
x=5

jadi, x+2= 5+2= 7