Year 8 Substitution Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 8 algebraic expressions worksheet.
Success TutoringWorksheetsAnswer sheetYear 8 · Mathematics · Algebraic ExpressionsYear 8 Substitution Worksheet — Level 2 — Practice Set 2 — Answers
Replace the letter with the number, then calculate. Use brackets for negative values.
1.Find the value of 7x when x = 6
Answer: 42
- 7 × 6 + 0
- = 42 + 0 = 42
2.Find the value of x − 1 when x = −2
Answer: −3
- 1 × (−2) − 1
- = −2 − 1 = −3
3.Find the value of 3x − 9 when x = −6
Answer: −27
- 3 × (−6) − 9
- = −18 − 9 = −27
4.Find the value of 7x − 1 when x = 6
Answer: 41
- 7 × 6 − 1
- = 42 − 1 = 41
5.Find the value of 2x + 2 when x = 6
Answer: 14
- 2 × 6 + 2
- = 12 + 2 = 14
6.Find the value of −4x + 5 when x = 8
Answer: −27
- −4 × 8 + 5
- = −32 + 5 = −27
7.Find the value of 5x + 2 when x = 1
Answer: 7
- 5 × 1 + 2
- = 5 + 2 = 7
8.Find the value of 7x + 7 when x = −3
Answer: −14
- 7 × (−3) + 7
- = −21 + 7 = −14
9.Find the value of 9x + 8 when x = 4
Answer: 44
- 9 × 4 + 8
- = 36 + 8 = 44
10.Find the value of 6x when x = −2
Answer: −12
- 6 × (−2) + 0
- = −12 + 0 = −12
11.Find the value of −3x + 1 when x = −6
Answer: 19
- −3 × (−6) + 1
- = 18 + 1 = 19
12.Find the value of −x − 2 when x = −1
Answer: −1
- −1 × (−1) − 2
- = 1 − 2 = −1
Marking tips
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