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Add 5 to both sides.  Then 45/v is greater than or equal to -8.

Mult. both sides by v to obtain "45 is greater than or equal to -8v."

Solving for v:  v is smaller than or equal to -45/8, or smaller than or equal to -5 5/8.  Does -3 satisfy this criterion?  NO.  Eliminate -3.
Does -9 satisfy this criterion?  YES.  And so on.

3cm and 6 and 9 cm that a possibility of that question

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