Question
Amir bought a comic book for 9$ and four pens. He spent a total of 25$. How much does each pen cost?
Answers
GPT-4o mini
Let \( x \) be the cost of each pen. Amir bought a comic book for $9 and four pens, which means he spent \( 4x \) on the pens. The total amount he spent is represented by the equation:
\[
9 + 4x = 25
\]
To solve for \( x \), first, subtract 9 from both sides:
\[
4x = 25 - 9
\]
\[
4x = 16
\]
Next, divide both sides by 4:
\[
x = \frac{16}{4}
\]
\[
x = 4
\]
Therefore, each pen costs \( \boxed{4} \) dollars.
\[
9 + 4x = 25
\]
To solve for \( x \), first, subtract 9 from both sides:
\[
4x = 25 - 9
\]
\[
4x = 16
\]
Next, divide both sides by 4:
\[
x = \frac{16}{4}
\]
\[
x = 4
\]
Therefore, each pen costs \( \boxed{4} \) dollars.