7th Grade Substitution Worksheet — Level 2 — Practice Set 4 — Answers
Answer sheet with worked solutions for the 7th Grade algebraic expressions worksheet.
Success TutoringWorksheetsAnswer sheet7th Grade · Mathematics · Algebraic Expressions7th Grade Substitution Worksheet — Level 2 — Practice Set 4 — Answers
Replace the letter with the number, then calculate. Use parentheses for negative values.
1.Find the value of 3x + 5 when x = −4
Answer: −7
- 3 × (−4) + 5
- = −12 + 5 = −7
2.Find the value of −3x − 6 when x = −6
Answer: 12
- −3 × (−6) − 6
- = 18 − 6 = 12
3.Find the value of −5x + 4 when x = 2
Answer: −6
- −5 × 2 + 4
- = −10 + 4 = −6
4.Find the value of −5x + 2 when x = −2
Answer: 12
- −5 × (−2) + 2
- = 10 + 2 = 12
5.Find the value of −2x − 7 when x = −3
Answer: −1
- −2 × (−3) − 7
- = 6 − 7 = −1
6.Find the value of 7x + 5 when x = 8
Answer: 61
- 7 × 8 + 5
- = 56 + 5 = 61
7.Find the value of 5x − 5 when x = 8
Answer: 35
- 5 × 8 − 5
- = 40 − 5 = 35
8.Find the value of −5x + 8 when x = 6
Answer: −22
- −5 × 6 + 8
- = −30 + 8 = −22
9.Find the value of −3x + 3 when x = 7
Answer: −18
- −3 × 7 + 3
- = −21 + 3 = −18
10.Find the value of 8x + 1 when x = −1
Answer: −7
- 8 × (−1) + 1
- = −8 + 1 = −7
11.Find the value of 8x − 2 when x = −3
Answer: −26
- 8 × (−3) − 2
- = −24 − 2 = −26
12.Find the value of 7x − 4 when x = 6
Answer: 38
- 7 × 6 − 4
- = 42 − 4 = 38
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