Answer :

The answer is 22. Work backwards and solve. Take 3 multiply by 9, subtract 5. 
So,

If you translate it into mathematical form, you get
[tex]\frac{5 + x}{9} = 3[/tex]

First, you would multiply both sides by 9.
[tex]5 + x = 27[/tex]

Subtract 5 from both sides
x = 22

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