Jawabanmu

2014-05-29T22:18:50+07:00
Kll = AB + BC + AC
46 = (3x+8) + (x + 13) + (x + 5)
46 = 3x + 8 + x + 13 + x + 5
46 = 5x + 26
5x = 46 - 26
5x = 20
x = 4

panjang AC = x + 5 = 4 + 5 = 9 cm
2014-05-29T22:18:53+07:00
AB + BC + AC =46cm
3x+8 + x+13 + x+5 = 46
5x + 26 = 46
5x = 46 - 26
5x =   20
x = 4 , AC = x+5 = 4+5 =9