A washer and a dryer cost 600 combined. The cost of the washer is 3 times the cost of the dryer. Wha

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A washer and a dryer cost 600 combined. The cost of the washer is 3 times the cost of the dryer. What is the cost of the dryer?

Let w be the cost of the washer. Let d be the cost of the dryer. We have 2 given equations:

1. w + d = 600
2. w = 3d

Substitute (2) into (1)
(3d) + d = 600
4d = 600

Run it through our equation calculator, to get d = 150.