Nine is subtracted from from a number and the result is multiplied by five to equal thirty.

15

Step-by-step explanation:

let the number be n then 9 subtracted from it is n - 9

This is then multiplied by 5 to equal 30

5(n - 9) = 30 ← divide both sides by 5

n - 9 = 6 ( add 9 to both sides )

n = 15

The number is 15

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