Final answer:
The cost of the dryer can be found by setting up the equation 2D + $47 = $797, where D is the cost of the dryer. Solving the equation reveals that the dryer costs $375.
Step-by-step explanation:
To solve for the cost of the dryer, we can set up two equations based on the information given:
Let D be the cost of the dryer.
Then, the cost of the washer is
D + $47.
Combined, their total cost is
D + (D + $47) = $797.
Combining like terms gives us
2D + $47 = $797.
Subtracting $47 from both sides gives us
2D = $797 - $47.
2D = $750.
Dividing both sides by 2 gives us
D = $375.
The cost of the dryer is $375.