Year 9 Substitution Worksheet — Level 2 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 9 algebraic expressions worksheet.
Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · Algebraic ExpressionsYear 9 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 2x + 5 when x = −4
Answer: −3
- 2 × (−4) + 5
- = −8 + 5 = −3
2.Find the value of −3x + 8 when x = 9
Answer: −19
- −3 × 9 + 8
- = −27 + 8 = −19
3.Find the value of x + 8 when x = 2
Answer: 10
- 1 × 2 + 8
- = 2 + 8 = 10
4.Find the value of 6x + 1 when x = −1
Answer: −5
- 6 × (−1) + 1
- = −6 + 1 = −5
5.Find the value of 8x − 5 when x = −4
Answer: −37
- 8 × (−4) − 5
- = −32 − 5 = −37
6.Find the value of 2x + 1 when x = 8
Answer: 17
- 2 × 8 + 1
- = 16 + 1 = 17
7.Find the value of 5x − 6 when x = 6
Answer: 24
- 5 × 6 − 6
- = 30 − 6 = 24
8.Find the value of −x when x = 4
Answer: −4
- −1 × 4 + 0
- = −4 + 0 = −4
9.Find the value of 4x − 4 when x = −3
Answer: −16
- 4 × (−3) − 4
- = −12 − 4 = −16
10.Find the value of 6x − 6 when x = 5
Answer: 24
- 6 × 5 − 6
- = 30 − 6 = 24
11.Find the value of −4x when x = −6
Answer: 24
- −4 × (−6) + 0
- = 24 + 0 = 24
12.Find the value of 6x + 6 when x = −2
Answer: −6
- 6 × (−2) + 6
- = −12 + 6 = −6
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