Answer: 12 ROSES
Explanation:
If we translate the problem to numbers you will see something like this:

Where:

So you have to solve the equation:
Its a first grade equation, you have to past the value with his product inverse, so the product transform into a division.
Then you have to solve the division between 108 and 9 to obtain the value:

And thats all.
To verify, now you can replace the x on the equation for the obtained value.

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