AlgebraMediumA number from two descriptions
Algebra practice question
Eight less than five times a number equals sixteen more than three times the number. What is the number?
Answer: 12
5n − 8 = 3n + 16, so 2n = 24 and n = 12.
Common wrong answers
- If you answered 3
- 3 comes from 8n = 24, adding 3n instead of subtracting.
- If you answered 4
- 4 comes from 2n = 8, subtracting 8 from 16 instead of adding.
- If you answered -12
- −12 comes from moving the terms with the wrong signs.
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