Solve for x: 4x + 5 = 33
Answer in (no unit).
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7 (no unit)
Subtract 5 from both sides: 4x = 28. Divide both sides by 4: x = 7. Check: 4 × 7 + 5 = 33.
Reference: Two-step linear equations
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Equations practice questions
32 questions from the electrical apprenticeship aptitude practice test.
Equations practice test
10 questions, graded as you go, with the reason for every answer. No sign-up.
What this covers
- Linear equations
- Literal equations
- Inequalities
- Systems of equations
Sample questions
Solve for x: 2(x − 3) = 16
Answer in (no unit).
Show the answer
11 (no unit)
Divide both sides by 2: x − 3 = 8. Add 3: x = 11. Check: 2 × (11 − 3) = 2 × 8 = 16.
Reference: Linear equations with parentheses; distributive property
Solve for x: 5x − 8 = 3x + 6
Answer in (no unit).
Show the answer
7 (no unit)
Subtract 3x from both sides: 2x − 8 = 6. Add 8: 2x = 14. Divide by 2: x = 7. Check: 5 × 7 − 8 = 27 and 3 × 7 + 6 = 27.
Reference: Linear equations with the variable on both sides