Answer:
1. The like terms are 11x and 2x and the terms are 11x and 2x
2. The like terms are 9x and -5x and the terms are 9x and -5x
3. the like terms are (21x and x) and (6 and -5) and the terms are 21x, 6, -x, and -5.
4. The like terms are (8x and -3x) and (14 and 1). And the terms are 8x, 14, -3x, and 1.
