Question

When 8 is subtracted from a certain number and the result is multiplied by 3 the answer is 21. What is the original number?​

Answer 1

The original number is 15.

Let’s work it out.

First, divide.

21 divided by 3 is 7.

Now, add.

8 + 7 = 15

This is true because...

15 - 8 = 7



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