Respuesta :
Let x be the cost of dryer, y be the cost of washer
x + y =821
x-79 = y
combine 2 equation
we got
x + (x-79) = 821
2x + 79 = 821
2x = 742
x=471
The cost of dryer is $471
x + y =821
x-79 = y
combine 2 equation
we got
x + (x-79) = 821
2x + 79 = 821
2x = 742
x=471
The cost of dryer is $471
Answer:
The cost of the dryer is 450
Step-by-step explanation:
Given : A washer and a dryer cost 821 combined.
The washer costs 79 less than the dryer.
To Find : The cost of dryer
Solution :
Let the cost of washer be x.
Let the cost of dryer be y.
Since we are given that their combined cost is 821 .
⇒ x+y = 821 ----(A)
We are also given that the washer costs 79 less than the dryer.
⇒x = y - 79 ----(B)
Solving A and B using substitution method .
Put value of x from (B) in (A)
⇒y -79 + y = 821
⇒2y -79 = 821
⇒2y = 821+79
⇒2y = 900
⇒y = 450
Thus , The cost of dryer 'y' is 450 .
Now putting this value in (B)
⇒x = 450-79
⇒x = 371
Thus , The cost of washer 'x' is 371 .
Hence The cost of dryer is 450
