The difference of twelve times a number and nine times a number

Question

Mathematics

Sylvia Kemp

17 August, 23:36

The difference of twelve times a number and nine times a number

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Answers (2)

Know the Answer?

Ana West · Answer 1

Since the problem states "a number" and again "a number", I assume it; 's the same number. Let the number be x.

12x - 9x = 3x

The difference of twelve times a number and nine times a number is three times the number.

Alexus · Answer 2

12x-9y

Difference means subtraction, so the difference between 12 times a number is known as 12x because we do not know what is being multiplied by 12. Same with 9 times a number. Since 12 and 9 have two numbers that we don't know the value of, we have to change one of them to a different variable because we do not know if it is the same number or not. So it would be 12x-9y, or any letters you choose.