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I subtract 8 from a certain number.i then multiply the result by 3 .The final answer is 21 .Find the original number​

Respuesta :

Answer:

15

Step-by-step explanation:

First, we will solve the first equation to find the value of x:

Original Number - 8 = x Original Number = x + 8

Now, we will use the second equation to find the value of x:

x * 3 = 21 x = 21 / 3 x = 7

Finally, we will use the value of x (7) in the equation we found to find the original number:

Original Number = x + 8 Original Number = 7 + 8 Original Number = 15

So, the original number is 15.

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