It is important to understand that if integer arithmetics is chosen, then all decimal numbers will be converted to integer fractions as part of the solution process. This may produce a solution that is long and somewhat confusing. 

Therefor, click on the 'Options' and select integer or real arithmetics to be used during the solution process (e.g., x=1/2 vs. x=0.5). Integer is selected by default, and in the case of your equation I switched integer to real (decimal) numbers and clicked on 'Apply':

That is how I got the following solutions:

So, the equation is not insoluble since it has 2 real solutions.