Jawabanmu

2014-09-08T17:14:57+07:00
1.b
2.(5x+3) - (x-1)
 =5x+3-x-1
 =(5x+x) - (3+-1)
 =6x - 2
3.(4y-8) - (2y+15z) 
 =4y-8 - 2y+15z
 =4y-8 - 2y-15z
 =(4y+2y) - (-8) - (-15z)
 =6y + 8 + 15z
4.5z+3 - 2z-y
 =(5z+2z) - 3 - (-y)
 =7z - 3 +y
5.6x+4 - x-y
 =6x+4 - x+y
 =(6x+x) - y+4
 =7x - y+4