Jawabanmu

2014-02-06T18:07:03+07:00
3 ( x + 5 ) = 2x + 20
3x + 15 = 2x + 20
3x - 2x = 20 - 15
x = 5

Semoga membantu:)
2014-02-06T18:09:23+07:00
3(x + 5)= 2x + 20
3x + 15= 2x + 20
3x - 2x = 20 - 15
x = 5