Year 7 Substitution Worksheet — Level 1 — Answers
Answer sheet with worked solutions for the Year 7 algebraic expressions worksheet.
Year 7 · Mathematics · Algebraic Expressions
Year 7 Substitution Worksheet — Level 1 — Answers
Success Tutoring
Replace the letter with the number, then calculate. Use brackets for negative values.
1.Find the value of 7x − 4 when x = 8
Answer: 52
- 7 × 8 − 4
- = 56 − 4 = 52
2.Find the value of −x − 5 when x = 1
Answer: −6
- −1 × 1 − 5
- = −1 − 5 = −6
3.Find the value of −5x − 8 when x = 2
Answer: −18
- −5 × 2 − 8
- = −10 − 8 = −18
4.Find the value of 3x − 8 when x = 6
Answer: 10
- 3 × 6 − 8
- = 18 − 8 = 10
5.Find the value of −5x + 3 when x = 9
Answer: −42
- −5 × 9 + 3
- = −45 + 3 = −42
6.Find the value of −2x + 8 when x = 3
Answer: 2
- −2 × 3 + 8
- = −6 + 8 = 2
7.Find the value of −5x − 8 when x = 3
Answer: −23
- −5 × 3 − 8
- = −15 − 8 = −23
8.Find the value of −3x + 4 when x = 2
Answer: −2
- −3 × 2 + 4
- = −6 + 4 = −2
9.Find the value of 7x − 6 when x = 1
Answer: 1
- 7 × 1 − 6
- = 7 − 6 = 1
10.Find the value of x − 9 when x = 4
Answer: −5
- 1 × 4 − 9
- = 4 − 9 = −5
11.Find the value of −5x − 7 when x = 1
Answer: −12
- −5 × 1 − 7
- = −5 − 7 = −12
12.Find the value of x + 5 when x = 4
Answer: 9
- 1 × 4 + 5
- = 4 + 5 = 9
Marking tips
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