5x
2x + 3x
5x� + 8
(2x� + 3) + (5 + 3x�)
- x� - 2
(2x� + 3) - (5 + 3x�)
4y� +7y
(y� - 2y) + (3y� + 9y)
- 2y� - 11y
(y� - 2y) - (3y� + 9y)
15x� - 14x
(18x� - 9x) + (- 3x� - 5x)
21x� - 4x
(18x� - 9x) - (- 3x� - 5x)
8x - 14
(5x - 9) + (3x - 5)
2x - 4
(5x - 9) - (3x - 5)
-2
(x + 9) - (x + 11)
y� + y - 2
(y� - 2y) - (-3y + 2)
2y +9
(y + 7) + (y + 2)