Respuesta :

altavistard

Answer:

regular price = $15

Step-by-step explanation:

Represent the regular price by d.  Then the discount was 0.20d, and the sale price was (1 - 0.20)d, or 0.80d, which is $12.

Solving for d, we divide both sides by 0.80:

d = regular price = $15

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