Jawabanmu

2014-08-08T10:10:37+07:00
(5x - 6y + 8z) + (7x - 9z) - (2y + 9z + 10x)
5x - 6y + 8z + 7x - 9z - 2y - 9z - 10x
= 5x + 7x - 10x - 6y - 2y + 8z - 9z - 9z
= 2x - 8y - 10z
2014-08-08T10:13:35+07:00
(5x-6y+8z) + (7x-9z) - (2y+9z+10x)
= 5x + 7x - 10x - 6y - 2y +8z - 9z -9z
= 2x -8y -10z