Answer: Let's start by representing the number of Blu-Ray discs sold as x.
According to the problem, the store sold 2/3 as many DVDs as Blu-Ray discs. So the number of DVDs sold is 2/3 of x, or (2/3)x.
We also know that the total number of DVDs and Blu-Ray discs sold was 280. So we can set up an equation:
(2/3)x + x = 280
To solve for x, we can simplify the equation by combining like terms:
(5/3)x = 280
Multiplying both sides by 3/5, we get:
x = 168
So the number of Blu-Ray discs sold was 168.
To find the number of DVDs sold, we can use the expression we derived earlier:
(2/3)x = (2/3) * 168 = 112
Therefore, the store sold 112 DVDs on that day.
Explanation: