Question

1. The number of rooms on the ground floor of a building is 12 less than twice the
number of rooms on the first floor. If the first floor has x rooms, how many rooma
does the ground floor have
​

Answer 1

Given

Number of rooms on the first floor =x

Twice the number of rooms on the first floor =2x

We know that the word 'less than' a number means 'subtracting' it from a number.

12 less than the number of rooms on the first floor =2x−12

∴ Number of rooms on the ground floor of a building =12 less than the number of rooms on the first floor

=2x−12

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