The equation 5x + (–2y) = 8 relates the amount spent, y, to the number of picture frames purchased, x, after a discount for buying two or more frames is applied to the total cost of the frames. How much is the discount?
To find the discount, we need to isolate the y variable in the equation.
Starting with the given equation: 5x + (-2y) = 8
Rearranging the terms: -2y = 8 - 5x
Dividing both sides by -2: y = (8 - 5x) / -2
Therefore, the discount is the value of (8 - 5x) / 2.