Jawapan

2015-08-27T23:51:43+08:00
Abu = 7x-4
Bala = 5x
Chong = 4x+8

Total = (7x-4)+5x+(4x+8)
= 7x+5x+4x-4+8
= 16x+4
= 4(4x+1) kg
2015-08-28T12:41:42+08:00
Total = 7x - 4 + 5x + 4x + 8
        = 7x + 5x + 4x - 4 + 8
        = 16x + 4
        = 4(4x+1)  Kg