math_celebrity Administrator Staff member May 3, 2018 #1 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: w + d = 600 w = 3d Substitute (2) into (1) (3d) + d = 600 4d = 600 Run it through our equation calculator, to get d = 150.

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: w + d = 600 w = 3d Substitute (2) into (1) (3d) + d = 600 4d = 600 Run it through our equation calculator, to get d = 150.