FreeMath
Grade 7hard

Free Pre-Algebra Practice

Pre-algebra is where math stops being just numbers and starts using letters. Evaluating expressions means substituting a value for the variable and computing the result — the simplest skill in algebra and the one everything else builds on. Each problem here gives a value of x and asks your student to plug it in. Watch for two common errors: forgetting order of operations (PEMDAS still rules), and mixing up signs when the expression has subtraction. Once these feel automatic, solving simple equations is the next short step.

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All 20 Practice Problems

Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.

  1. 1.Evaluate 7x + 6 when x = 5
  2. 2.Evaluate 2x − 6 when x = 12
  3. 3.Evaluate 9(x + 1) when x = 12
  4. 4.Evaluate x² + 5 when x = 4
  5. 5.Evaluate 4x + 3 when x = 12
  6. 6.Evaluate 4x − 1 when x = 3
  7. 7.Evaluate 6(x + 9) when x = 9
  8. 8.Evaluate x² + 5 when x = 4
  9. 9.Evaluate 2x + 9 when x = 7
  10. 10.Evaluate 6x − 2 when x = 11
  11. 11.Evaluate 8(x + 2) when x = 12
  12. 12.Evaluate x² + 7 when x = 3
  13. 13.Evaluate 7x + 3 when x = 3
  14. 14.Evaluate 5x − 4 when x = 6
  15. 15.Evaluate 8(x + 5) when x = 12
  16. 16.Evaluate x² + 7 when x = 2
  17. 17.Evaluate 3x + 3 when x = 8
  18. 18.Evaluate 7x − 4 when x = 2
  19. 19.Evaluate 9(x + 4) when x = 4
  20. 20.Evaluate x² + 7 when x = 6
Show answer key
  1. 1.Evaluate 7x + 6 when x = 5 Answer: 41
  2. 2.Evaluate 2x − 6 when x = 12 Answer: 18
  3. 3.Evaluate 9(x + 1) when x = 12 Answer: 117
  4. 4.Evaluate x² + 5 when x = 4 Answer: 21
  5. 5.Evaluate 4x + 3 when x = 12 Answer: 51
  6. 6.Evaluate 4x − 1 when x = 3 Answer: 11
  7. 7.Evaluate 6(x + 9) when x = 9 Answer: 108
  8. 8.Evaluate x² + 5 when x = 4 Answer: 21
  9. 9.Evaluate 2x + 9 when x = 7 Answer: 23
  10. 10.Evaluate 6x − 2 when x = 11 Answer: 64
  11. 11.Evaluate 8(x + 2) when x = 12 Answer: 112
  12. 12.Evaluate x² + 7 when x = 3 Answer: 16
  13. 13.Evaluate 7x + 3 when x = 3 Answer: 24
  14. 14.Evaluate 5x − 4 when x = 6 Answer: 26
  15. 15.Evaluate 8(x + 5) when x = 12 Answer: 136
  16. 16.Evaluate x² + 7 when x = 2 Answer: 11
  17. 17.Evaluate 3x + 3 when x = 8 Answer: 27
  18. 18.Evaluate 7x − 4 when x = 2 Answer: 10
  19. 19.Evaluate 9(x + 4) when x = 4 Answer: 72
  20. 20.Evaluate x² + 7 when x = 6 Answer: 43

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