Jawabanmu

2014-05-27T21:17:10+07:00
3x+4x+5 = 84 cm
7x = 79
x = 79 / 7
x = 11 2/7
1 5 1
2014-05-27T21:17:11+07:00
K = 84
3x + 4x + 5 = 84
3x + 4x = 84-5
7x = 79
x = 11,2

panjang masing2
3x = 3 x 11,2 = 33,6
4x = 4 x 11,2 = 44,8
5
Komentar sudah dihapus
ya 11,2 diganti 11,2857142.........