Question

Jackson buys a notebook worth $\$10$ and 5 pens from a stationery store. He spends a total of $\$85$ at the store. What is the price of each pen?

• A. $10
• B. $20
• C. $15
• D. $5

Answer 1

The correct option is C $15

Price of the notebook $=\$10$
Let the price of each pen be $\$x$.
Total price of 5 pens $=x\times 5=\$5x$
Total money spent by Jackson $=\$85$
Price of the notebook + total price of 5 pens = total money spent
$\Rightarrow 10+5x=85$
Step 1: Subtract 10 from both sides of the equation.
$\Rightarrow 10+5x-10=85-10$
$\Rightarrow 5x=75$
Step 2: Divide both sides by 5.
$\Rightarrow \frac{5x}{5}=\frac{75}{5}$
$\Rightarrow x=\$15$
Hence, the price of each pen is $\$15$.