Question

The number of rooms on the ground floor of a building is 12 less than twice of the number of rooms on first floor . If the first floor has x rooms how many rooms does the ground floor have if the total rooms are 33

Answer 1

g = the number of rooms on the ground floor

x = the number of rooms on the the first floor

The number of rooms on the ground floor of a building is 12 less than twice of the number of rooms on first floor mean:

g = 2 x - 12

The total rooms are 33 mean:

x + g = 33

Now you must solve system of equations:

g = 2 x - 12

x + g = 33

Try that.

The solutions are g = 18 x = 15

The ground floor have 18 rooms.