when 12 is subtracted from Three Times A Certain number and the result is : 4 the answer is 18 find the number

28

Step-by-step explanation:

Let the number be x.

When 12 is subtracted from three times a certain number ...

3x - 12

and the result is divided by 4 ...

(3x - 12) : 4

the answer is 18.

(3x - 12) : 4 = 18

Let's work backwards to find the number.

3x-12 = 18 * 4 (*4 throughout)

3x - 12 = 72

3x = 72 + 12 (+12 on both sides)

3x = 84

x = 84 : 3

x = 28

Thus, the number is 28.