(0.7p)=p-250 30% off of p must be equal to 250 less than p. As a result you can say that 0.7p (0.7Xp), which is 70% of p (100%-30%=70%) is equal to p-250, so 0.7p=p-250.
0.7p = (p - 250) ;
The equation that models the sale prices of the television in both stores is 0.70 p = p − 250 . This represents the price after the discount in Store A being equal to the price after the discount in Store B. Therefore, both stores are selling the television at the same sale price according to Allison's observation.
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