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8th Grade Substitution Worksheet — Level 2 — Practice Set 2 — Answers

Answer sheet with worked solutions for the 8th Grade algebraic expressions worksheet.

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Success TutoringWorksheetsAnswer sheet8th Grade · Mathematics · Algebraic Expressions

8th Grade Substitution Worksheet — Level 2 — Practice Set 2 — Answers

Replace the letter with the number, then calculate. Use parentheses for negative values.

1.Find the value of −2x + 3 when x = −6

Answer: 15

  1. −2 × (−6) + 3
  2. = 12 + 3 = 15
2.Find the value of x − 3 when x = 1

Answer: −2

  1. 1 × 1 − 3
  2. = 1 − 3 = −2
3.Find the value of 9x − 3 when x = −4

Answer: −39

  1. 9 × (−4) − 3
  2. = −36 − 3 = −39
4.Find the value of 6x + 3 when x = −4

Answer: −21

  1. 6 × (−4) + 3
  2. = −24 + 3 = −21
5.Find the value of x − 1 when x = 6

Answer: 5

  1. 1 × 6 − 1
  2. = 6 − 1 = 5
6.Find the value of −2x + 8 when x = 4

Answer: 0

  1. −2 × 4 + 8
  2. = −8 + 8 = 0
7.Find the value of x − 7 when x = −2

Answer: −9

  1. 1 × (−2) − 7
  2. = −2 − 7 = −9
8.Find the value of −2x + 1 when x = −2

Answer: 5

  1. −2 × (−2) + 1
  2. = 4 + 1 = 5
9.Find the value of 9x + 8 when x = 4

Answer: 44

  1. 9 × 4 + 8
  2. = 36 + 8 = 44
10.Find the value of 7x − 8 when x = −6

Answer: −50

  1. 7 × (−6) − 8
  2. = −42 − 8 = −50
11.Find the value of 4x − 1 when x = −6

Answer: −25

  1. 4 × (−6) − 1
  2. = −24 − 1 = −25
12.Find the value of 7x + 2 when x = 1

Answer: 9

  1. 7 × 1 + 2
  2. = 7 + 2 = 9
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