Answer:
$185 = ($35.25 * P) + ($7.50 * r)
Step-by-step explanation:
If the total that the customer paid was $185 this means that the equation must equal $185. The equation itself must be the number of gallons of exterior paint (P) that the customer ordered multiplied by the price per gallon ($36.25), which is then added to the product of the number of rollers the customer ordered (r) and the price per roller ($7.50). This together would form the following equation...
$185 = ($35.25 * P) + ($7.50 * r)