Question

The science club is selling magazine subscriptions at \(\$ 15\) each. The club wants to raise \(\$ 315\) for science equipment. Use mental math to solve the equation.

Short answer

21 magazine subscriptions need to be sold to raise $315.

Step-by-step solution

Understand the problem

The task is to figure out how many $15 subscriptions need to be sold in order to raise $315.

Identify the relevant information

Every magazine subscription is sold for $15, and the total amount of money that needs to be raised is $315.

Formulate the mathematical equation

The equation that represents this problem can be written as \(15x = 315\), where x represent the number of subscriptions to be sold.

Solve the equation

To find out the number of subscriptions, divide the total amount of money that needs to be raised by the price of each subscription, i.e., \(x = 315/15\).

Find the solution

Divide 315 by 15 to find the solution, i.e., x = 21.