Here it the answer to you question Lenona
I think you must have deleted it because I cannot see the question anymore but you can have the answer anyway :)
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$$6x=\frac{3}{8}$$
You need to get the x on its own so you need to get rid of the 6
At the moment it is $${\mathtt{6}}{\mathtt{\,\times\,}}{\mathtt{x}}$$ There is an invisable times sign between the 6 and the $${\mathtt{x}}$$.
The opposite of times is divide.
So you will need to DIVIDE BOTH SIDES BY 6.
$$\frac{\not{6}x}{\not{6}}=\frac{3}{8} \div 6$$
Note that a fraction line IS a divide sign. They are really the same thing.
If you look at the divide sign $$\div$$ you can see how you could replace the dots with numbers and you would have a fraction. :)