Jawabanmu

2014-09-07T21:33:51+07:00
5x - 6y + 8z + 7x - 9z - 2y - 9z + 10
= 5x + 7x - 6y - 2y + 8z - 9z - 9z + 10
= 12x - 8y - 10z + 10
semoga bermanfaat :)))
oh iya, jadi -10 = 12x - 8y - 10z
iyaa, itu bisa juga kok.
2014-09-07T21:33:51+07:00
(5x-6y+8z)+(7x-9z)-(2y+9z-10)
= 5x+7x-6y-2y+8z-9z-9z+10
= 12x-8y-10z+10
= 12x-8y-10z = -10