Jawabanmu

2014-03-05T06:20:08+07:00
7x+3 = 4x - 18
7x - 4x + 3 +18
3x + 21 = 0
3x = -21
x = -7 :) selamat pagi :P
2014-03-05T06:20:52+07:00
7x + 3 = 4x -18 
7x - 4x = -18 - 3
3x = -21
x = 21- ÷ 3
x = -7