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 + 4
Answer: −x + 4
- 2x − 3x = −x
2.Simplify: x − 2x + 2
Answer: −x + 2
- x − 2x = −x
3.Simplify: −5x + 6x + 4
Answer: x + 4
- −5x + 6x = x
4.Simplify: −x + 9x + 9
Answer: 8x + 9
- −x + 9x = 8x
5.Simplify: 8x − 3x + 5
Answer: 5x + 5
- 8x − 3x = 5x
6.Simplify: −4x − 4x + 2
Answer: −8x + 2
- −4x − 4x = −8x
7.Simplify: x + 9x + 8
Answer: 10x + 8
- x + 9x = 10x
8.Simplify: 4x + x + 5
Answer: 5x + 5
- 4x + x = 5x
9.Simplify: −6x − x + 4
Answer: −7x + 4
- −6x − x = −7x
10.Simplify: x + 5x + 1
Answer: 6x + 1
- x + 5x = 6x
11.Simplify: 7x + 3x + 5
Answer: 10x + 5
- 7x + 3x = 10x
12.Simplify: 4x − 6x + 2
Answer: −2x + 2
- 4x − 6x = −2x
13.Simplify: x − 6x + 2
Answer: −5x + 2
- x − 6x = −5x
14.Simplify: 6x − 3x + 6
Answer: 3x + 6
- 6x − 3x = 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.