Year 7 Substitution Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 7 algebraic expressions worksheet.
Success TutoringWorksheetsAnswer sheetYear 7 · Mathematics · Algebraic ExpressionsYear 7 Substitution Worksheet — Level 2 — Practice Set 3 — Answers
Replace the letter with the number, then calculate. Use brackets for negative values.
1.Find the value of x − 8 when x = 4
Answer: −4
- 1 × 4 − 8
- = 4 − 8 = −4
2.Find the value of 2x + 9 when x = −4
Answer: 1
- 2 × (−4) + 9
- = −8 + 9 = 1
3.Find the value of 9x − 8 when x = −3
Answer: −35
- 9 × (−3) − 8
- = −27 − 8 = −35
4.Find the value of x + 8 when x = −2
Answer: 6
- 1 × (−2) + 8
- = −2 + 8 = 6
5.Find the value of −5x + 2 when x = 3
Answer: −13
- −5 × 3 + 2
- = −15 + 2 = −13
6.Find the value of 9x − 5 when x = 2
Answer: 13
- 9 × 2 − 5
- = 18 − 5 = 13
7.Find the value of −5x + 5 when x = 9
Answer: −40
- −5 × 9 + 5
- = −45 + 5 = −40
8.Find the value of −5x + 1 when x = −4
Answer: 21
- −5 × (−4) + 1
- = 20 + 1 = 21
9.Find the value of 9x + 3 when x = −3
Answer: −24
- 9 × (−3) + 3
- = −27 + 3 = −24
10.Find the value of −5x − 3 when x = 2
Answer: −13
- −5 × 2 − 3
- = −10 − 3 = −13
11.Find the value of x + 4 when x = −3
Answer: 1
- 1 × (−3) + 4
- = −3 + 4 = 1
12.Find the value of 5x − 4 when x = 5
Answer: 21
- 5 × 5 − 4
- = 25 − 4 = 21
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