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
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Replace the letter with the number, then calculate. Use brackets for negative values.
1.Find the value of −5x − 6 when x = 6
Answer: −36
- −5 × 6 − 6
- = −30 − 6 = −36
2.Find the value of −x + 6 when x = 3
Answer: 3
- −1 × 3 + 6
- = −3 + 6 = 3
3.Find the value of 7x − 1 when x = 7
Answer: 48
- 7 × 7 − 1
- = 49 − 1 = 48
4.Find the value of 9x − 3 when x = 9
Answer: 78
- 9 × 9 − 3
- = 81 − 3 = 78
5.Find the value of 2x − 5 when x = 8
Answer: 11
- 2 × 8 − 5
- = 16 − 5 = 11
6.Find the value of 5x + 8 when x = 7
Answer: 43
- 5 × 7 + 8
- = 35 + 8 = 43
7.Find the value of −x + 5 when x = 5
Answer: 0
- −1 × 5 + 5
- = −5 + 5 = 0
8.Find the value of 4x + 7 when x = 9
Answer: 43
- 4 × 9 + 7
- = 36 + 7 = 43
9.Find the value of 6x + 5 when x = 5
Answer: 35
- 6 × 5 + 5
- = 30 + 5 = 35
10.Find the value of −4x + 6 when x = 4
Answer: −10
- −4 × 4 + 6
- = −16 + 6 = −10
11.Find the value of 8x + 6 when x = 8
Answer: 70
- 8 × 8 + 6
- = 64 + 6 = 70
12.Find the value of −3x + 3 when x = 5
Answer: −12
- −3 × 5 + 3
- = −15 + 3 = −12
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