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The difference of a number and 7 is 21. (1 point)
21– 7 = n; n =14
n + 7 = 21; n = 14
n – 7 = 21; n =28
21 – n = 7; n = 14

Answer :

coolstick
Since it says the difference of a number and 7, that means subtract. Next, the 7 is stated after the number, so n-7=21 (we get =21 from is 21). C is correct

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