Answer:
[tex]\frac{27}{2} +9\sqrt{2}[/tex]; 26.22792
Step-by-step explanation:
Assuming you mean find the value of [tex]3x+\frac{1}{2}(3x)[/tex] (please format your question correctly)...
The question has told you the x value or rather some numerical values. Just like for every other equation, replace x with its numerical value.
[tex]3(3+\sqrt{8})+\frac{1}{2}(3(3+\sqrt{8} ))[/tex]
This question is best suited to use a calculator as doing this on paper is absolutely necessary.
Putting this in the calculator you should get: [tex]\frac{27}{2} +9\sqrt{2}[/tex] or 26.22792
