1 is subtracted from eight times a certain number the result is 15 find the certain number

Step 1: Represent the certain number by a variable.
Let's assume the certain number is represented by the variable "x".

Step 2: Express the given conditions as an equation.
According to the problem, "1 is subtracted from eight times a certain number, and the result is 15." This can be written as the equation:
8x - 1 = 15

Step 3: Solve the equation for the certain number.
To find the value of "x," we need to isolate it on one side of the equation. Let's solve the equation:

8x - 1 = 15

Adding 1 to both sides of the equation:

8x = 15 + 1
8x = 16

Continuing to isolate "x," divide both sides of the equation by 8:

8x/8 = 16/8
x = 2

Step 4: Final answer.
Therefore, the certain number is 2.