1. -x + 2y – 3 z + 3x – 6y 2. -5k + 3 h – (9k-2h) 3. 2 (x-3y) – 3 (x-y)

1. -x + 3x +2y – 6y – 3z
= 2x + (-4y) – 3z
2. -5k + 3h – 9k + 2h
= -5k -9k + 3h + 2h
= -14k + 5h
3. 2x – 6y -3x + 3 y
= 2x -3x -6y+3y
= -1x – 3y