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Advocard [28]
3 years ago
12

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

Mathematics
2 answers:
inna [77]3 years ago
6 0

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.

Crank3 years ago
6 0

12x-9y

Difference means subtraction, so the difference between 12 <u>times a number</u> 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.

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