Question

benny thinks of a number subtracts 18 from it divides the difference by 3 . the result is -4. what is the number

Answer 1

Let the number which Benny thinks be x,


According to the given, Benny first subtracts 18 from the number, so difference will be x - 18. also given that he later divides that difference which is ( x - 18 ) by 3 , Benny gets - 4 as result.


First, 18 is subtracted .
Number = x - 18


Then, divided by 3
Number = ( x - 18 ) / 3


Result = - 4

( x - 18 ) / 3 = - 4

x - 18 = - 12

x = 18 - 12

x = 6



Therefore, the number which Benny thinks is 6.

$\:$

Answer 2

Benny thinks a number.
Let, the number be x.

According to the question,
Benny subtracts 18 form it (x - 18), and divides the difference by 3, and the result is -4.

So,
The equation will be,

$= > \frac{x - 18}{3} = - 4 \\ \\ = > x - 18 = - 4 \times3 \\ \\ = > x - 18 = - 12 \\ \\ = > x = - 12 + 18 \\ \\ = > x = 6$

Hence , the number x is 6 which Benny thought of.