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9th Grade Substitution Worksheet — Level 2 — Practice Set 3 — Answers

Answer sheet with worked solutions for the 9th Grade algebraic expressions worksheet.

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Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Algebraic Expressions

9th Grade Substitution Worksheet — Level 2 — Practice Set 3 — Answers

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

1.Find the value of 3x − 1 when x = 4

Answer: 11

  1. 3 × 4 − 1
  2. = 12 − 1 = 11
2.Find the value of −3x − 1 when x = −6

Answer: 17

  1. −3 × (−6) − 1
  2. = 18 − 1 = 17
3.Find the value of −2x − 6 when x = 9

Answer: −24

  1. −2 × 9 − 6
  2. = −18 − 6 = −24
4.Find the value of x − 4 when x = 7

Answer: 3

  1. 1 × 7 − 4
  2. = 7 − 4 = 3
5.Find the value of 8x + 5 when x = 2

Answer: 21

  1. 8 × 2 + 5
  2. = 16 + 5 = 21
6.Find the value of −3x + 9 when x = 4

Answer: −3

  1. −3 × 4 + 9
  2. = −12 + 9 = −3
7.Find the value of 2x − 4 when x = 3

Answer: 2

  1. 2 × 3 − 4
  2. = 6 − 4 = 2
8.Find the value of 7x + 7 when x = 6

Answer: 49

  1. 7 × 6 + 7
  2. = 42 + 7 = 49
9.Find the value of 8x − 1 when x = 3

Answer: 23

  1. 8 × 3 − 1
  2. = 24 − 1 = 23
10.Find the value of 9x + 9 when x = −1

Answer: 0

  1. 9 × (−1) + 9
  2. = −9 + 9 = 0
11.Find the value of 5x − 4 when x = −2

Answer: −14

  1. 5 × (−2) − 4
  2. = −10 − 4 = −14
12.Find the value of x when x = 9

Answer: 9

  1. 1 × 9 + 0
  2. = 9 + 0 = 9
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