Year 9 Simplifying Expressions (Like Terms) Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the Year 9 algebraic expressions worksheet.
Year 9 Simplifying Expressions (Like Terms) Worksheet — Level 1 — Practice Set 4 — Answers
Collect the like terms. Only terms with exactly the same letter and power can be added.
1.Simplify: 2x + 3x + 8
Answer: 5x + 8
- 2x + 3x = 5x
2.Simplify: x − 6x + 4
Answer: −5x + 4
- x − 6x = −5x
3.Simplify: 8x + 6x + 2
Answer: 14x + 2
- 8x + 6x = 14x
4.Simplify: 5x − x + 2
Answer: 4x + 2
- 5x − x = 4x
5.Simplify: −5x + 9x + 6
Answer: 4x + 6
- −5x + 9x = 4x
6.Simplify: 7x + 9x + 4
Answer: 16x + 4
- 7x + 9x = 16x
7.Simplify: −6x + x + 3
Answer: −5x + 3
- −6x + x = −5x
8.Simplify: 8x + 4x + 9
Answer: 12x + 9
- 8x + 4x = 12x
9.Simplify: −2x − 6x + 9
Answer: −8x + 9
- −2x − 6x = −8x
10.Simplify: 5x + 9x + 6
Answer: 14x + 6
- 5x + 9x = 14x
11.Simplify: 6x + 9x + 1
Answer: 15x + 1
- 6x + 9x = 15x
12.Simplify: −2x + 4x + 1
Answer: 2x + 1
- −2x + 4x = 2x
13.Simplify: −5x + 9x + 2
Answer: 4x + 2
- −5x + 9x = 4x
14.Simplify: x − 4x + 5
Answer: −3x + 5
- x − 4x = −3x
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.