waiting for someone to be able to develop a custom function that can solve the equations (I'm trying but it is not easy), I attach a file that solves them using the WolframAlpha's API:
Registration is free and allows the solution of 2000 equations per month.
At the end of registration you will get your AppId that you'll need to write in the appropriate field.
PS: if you wish, you can also obtain the graphs of the functions!
PS: the attached screenshot is from an italian version!