One-third of the difference of a number and nine is negative fifteen. What is the number?​

hi <3

lets call the unknown number 'x' for now and form an equation from what we know

1/3(x-9) = 15

now multiply both sides by 3

x - 9 = 45

add 9 to both sides

x = 54

hope this helps :)

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Step-by-step explanation:

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