8th Grade Simplifying Expressions (Like Terms) Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 8th Grade algebraic expressions worksheet.
8th Grade 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 − 2x + 7
Answer: −4x + 7
- −2x − 2x = −4x
2.Simplify: −4x + 2x + 8
Answer: −2x + 8
- −4x + 2x = −2x
3.Simplify: −x − 6x + 3
Answer: −7x + 3
- −x − 6x = −7x
4.Simplify: 5x − 2x + 1
Answer: 3x + 1
- 5x − 2x = 3x
5.Simplify: 4x − 3x + 2
Answer: x + 2
- 4x − 3x = x
6.Simplify: −2x + 4x + 7
Answer: 2x + 7
- −2x + 4x = 2x
7.Simplify: 8x − 5x + 7
Answer: 3x + 7
- 8x − 5x = 3x
8.Simplify: −6x + 8x + 9
Answer: 2x + 9
- −6x + 8x = 2x
9.Simplify: −5x + 9x + 6
Answer: 4x + 6
- −5x + 9x = 4x
10.Simplify: 4x + x + 1
Answer: 5x + 1
- 4x + x = 5x
11.Simplify: 9x + 6x + 7
Answer: 15x + 7
- 9x + 6x = 15x
12.Simplify: 7x + x + 4
Answer: 8x + 4
- 7x + x = 8x
13.Simplify: −6x + x + 2
Answer: −5x + 2
- −6x + x = −5x
14.Simplify: 7x + 8x + 5
Answer: 15x + 5
- 7x + 8x = 15x
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.