Sales at a local ice cream shop went up 30% in 5 years. if 18,000 ice cream cones were sold in that current year, find the number of ice cream cones sold 5 years ago

Step-by-step explanation:

Let

x -----> the number of ice cream cones sold 5 years ago

Remember that

we know that

Sales 5 years ago, multiplied by the 30% increase should equal 18,000 ice cream cones.

so

The linear equation that represent this problem is

Solve for x

Divide by 1.3 both sides

12/11c

or

12

c

11