9th Grade Solving Linear Equations Worksheet — Level 1 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 9th Grade linear equations worksheet.
Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Linear Equations9th Grade Solving Linear Equations Worksheet — Level 1 — Practice Set 4 — Answers
Solve each equation. Show every step and check your answer by substituting it back in.
1.x − 20 = −9
Answer: x = 11
- Add 20 to both sides
- x = −9 + 20 = 11
2.8x = 40
Answer: x = 5
- Divide both sides by 8
- x = 40 ÷ 8 = 5
3.x − 16 = −8
Answer: x = 8
- Add 16 to both sides
- x = −8 + 16 = 8
4.x − 2 = −1
Answer: x = 1
- Add 2 to both sides
- x = −1 + 2 = 1
5.x − 18 = −10
Answer: x = 8
- Add 18 to both sides
- x = −10 + 18 = 8
6.x − 13 = −3
Answer: x = 10
- Add 13 to both sides
- x = −3 + 13 = 10
7.2x = 10
Answer: x = 5
- Divide both sides by 2
- x = 10 ÷ 2 = 5
8.x + 7 = 18
Answer: x = 11
- Subtract 7 from both sides
- x = 18 − 7 = 11
9.x + 14 = 22
Answer: x = 8
- Subtract 14 from both sides
- x = 22 − 14 = 8
10.2x = 22
Answer: x = 11
- Divide both sides by 2
- x = 22 ÷ 2 = 11
11.x + 9 = 21
Answer: x = 12
- Subtract 9 from both sides
- x = 21 − 9 = 12
12.x − 9 = −5
Answer: x = 4
- Add 9 to both sides
- x = −5 + 9 = 4
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.