AlgebraEasyNumber of pens from a budget
Algebra practice question
A pen costs $3 and a notebook costs $6. Kai buys one notebook and some pens for a total of $30. How many pens does Kai buy?
Answer: 8
3p + 6 = 30, so p = 8.
Common wrong answers
- If you answered 10
- 10 divides 30 by 3 without paying for the notebook.
- If you answered 12
- 12 adds 6 before dividing instead of subtracting.
- If you answered 24
- 24 is what the pens cost in dollars.
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