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divide by 21

Q: What is the reverse of multiply by 21?

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The reverse, in the sense of undoing the effects of "divide by 21" is "multiply by 21".

the reverse would be to divide by 5 or the inverse would be to multiply by 1/5 (both answers are mathematically the same)

Divide by 9

multiply by -1...

multiply by 1/38

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The reverse, in the sense of undoing the effects of "divide by 21" is "multiply by 21".

the reverse would be to divide by 5 or the inverse would be to multiply by 1/5 (both answers are mathematically the same)

21 multiply by 10 = 210

Divide by 9

multiply by -1...

Multiply by 36

365 multiply by 24 then multiply that answer by 21 and it is 183960

multiply by 1/38

1 and 21 3 and 7

- * - = + - * + = - + * + = + - / - = + - / + = - + / + = + *= multiply /=divide

How about: 3*7 = 21 or 1*21 = 21

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