AlgebraEasyPrice of a pencil from a pair of facts
Algebra practice question
A pen and a pencil cost 3 dollars together, and the pen costs 2 dollars more than the pencil. What is the cost of the pencil, in dollars?
Answer: 1/2 or .5 or 0.5
If the pencil costs p, the pen costs p + 2, and 2p + 2 = 3, so p = 0.5.
Common wrong answers
- If you answered 1
- 1 splits the 3 dollars into 1 and 2 without checking the difference.
- If you answered 2.5
- 2.5 is the cost of the pen.
- If you answered 1.5
- 1.5 halves the total and ignores the difference.
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