Answer:

Step-by-step explanation:
Given
Represent Mugs with M and Refills with R

per refill

Required
Determine the equation
If 1 refill costs $1.50, then
R refills will cost 1.50 * R
The relationship between the given parameters is:

Substitute values for Total, M and Refills


Solve for 1.50R


<em>Hence, the equation to solve the value of R is </em>
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