Jawabanmu

2014-09-04T19:22:19+07:00
2014-09-04T19:22:43+07:00
 (5x-6y+8z)+(7x-9z)-(2y+9z-10)5x+7x-6y-2y+8z-9z-9z+10
12x-8y-10z+10