Question

3 times a number decreased by 6 gives 18. find the number

Answer 1

Let Number be x
We are Given, 3(x-6)=18
                  so, 3x-18=18
                        3x=36
                          x=36/3= 12
 
                  So, The Number is 12.

Answer 2

A number =x
3 times of a number 3x
3x decreased by 6 = 18
3x-6=18
3x=18+6
3x=24
x=24/3
x=8
The given number =8