Well you would have to set up the equation first.
X is going to equal the price of the dryer.
The equation that would be set up then is 3x + x = 1160.
Then you add the common numerals, in this case 4x = 1160.
Then you would divide, which gives you x = 290
The dryer costs $290.
Then you would multiply the dryer price by 3, because the washer is 3 times as much as the dryer.
And finally, you get: Dryer = $290
Washer = $870