7th Grade Substitution Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 7th Grade algebraic expressions worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Algebraic Expressions7th Grade Substitution Worksheet — Level 2 — Practice Set 3 — Answers
Replace the letter with the number, then calculate. Use parentheses for negative values.
1.Find the value of −4x − 1 when x = 3
Answer: −13
- −4 × 3 − 1
- = −12 − 1 = −13
2.Find the value of x + 3 when x = 6
Answer: 9
- 1 × 6 + 3
- = 6 + 3 = 9
3.Find the value of −3x − 6 when x = 7
Answer: −27
- −3 × 7 − 6
- = −21 − 6 = −27
4.Find the value of 4x + 4 when x = 6
Answer: 28
- 4 × 6 + 4
- = 24 + 4 = 28
5.Find the value of −5x + 7 when x = 5
Answer: −18
- −5 × 5 + 7
- = −25 + 7 = −18
6.Find the value of −x + 2 when x = 6
Answer: −4
- −1 × 6 + 2
- = −6 + 2 = −4
7.Find the value of −3x − 9 when x = 3
Answer: −18
- −3 × 3 − 9
- = −9 − 9 = −18
8.Find the value of 8x + 7 when x = −6
Answer: −41
- 8 × (−6) + 7
- = −48 + 7 = −41
9.Find the value of −5x + 5 when x = −2
Answer: 15
- −5 × (−2) + 5
- = 10 + 5 = 15
10.Find the value of 5x + 8 when x = −6
Answer: −22
- 5 × (−6) + 8
- = −30 + 8 = −22
11.Find the value of −2x + 5 when x = 9
Answer: −13
- −2 × 9 + 5
- = −18 + 5 = −13
12.Find the value of −4x − 1 when x = 4
Answer: −17
- −4 × 4 − 1
- = −16 − 1 = −17
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.