A washer and a dryer cost $1000 combined. The cost of the washer is three times the cost of the dryer. What is the cost of the dryer?
Let's assume the cost of the dryer is x dollars.
The cost of the washer is then 3x dollars.
The total cost of the washer and dryer combined is x + 3x = 1000.
Combining like terms, we get 4x = 1000.
Dividing both sides by 4, we find x = 1000 / 4 = 250.
Therefore, the cost of the dryer is $250.