Question

The number of rooms at Hotel G is 10 less than twice the number of rooms at Hotel H. If the total number of rooms at Hotel G and Hotel H is 425, what is the number of rooms at Hotel G?
(A) 140
(B) 180
(C) 200
(D) 240
(E) 280

Answer 1

Answer:the number of rooms at Hotel G is 280

Step-by-step explanation:

Let x represent the number of rooms at hotel G.

Let y represent the number of rooms at hotel H.

The number of rooms at Hotel G is 10 less than twice the number of rooms at Hotel H. This means that

x = 2y - 10 - - - - - - - - - - -1

If the total number of rooms at Hotel G and Hotel H is 425, it means that

x + y = 425

Substituting x = 425 - y into equation 1, it becomes

425 - y = 2y - 10

3y = 425 + 10 = 435

y = 435/3 = 145

x = 425 - y = 425 - 145

x = 280

Answer 2

Answer:

280

Step-by-step explanation:

let the number of rooms at Hotel H=x

number of rooms at Hotel G=2x-10

now total number of rooms at Hotel G and Hotel H=x+2x-10=3x-10

but total number of rooms=425

3x-10=425

3x=425+10=435

x=435/3=145

so number of rooms at Hotel H=145

number of rooms at Hotel G=425-145=280