A washer and dryer cost $750 combined the cost of the washer is two times the cost of the dryer what is the cost of the dryer

Answer 1

You need two equations.

w + d = 750 (cost of washer plus cost of dryer is $750)

w = 2d (washer costs two times the cost of the dryer)

Since you cannot solve an equation with two variables (letters), use the second equation to replace the "w" in the first equation with "2d".

2d + d = 750

3d = 750

Divide both sides by 3: d = 250

Now that you know the dryer costs $250, plug that number into the first equation: w + 250 = 750.

Subtract 250 from both sides: w = 500. The washer costs $500.