Solve App problem

[kruki]

Hi
I bought HP Prime app for android and tried to solve some simple equation via built in Solve app but "Cannot find solution" error appeared.
Here are the steps I tried:

1. http://i.imgur.com/84wtJKw.png
2. http://i.imgur.com/nEA2T4l.png
or
1. http://i.imgur.com/vHf70j0.png
2. http://i.imgur.com/jkHRnN5.png

and the result is always
http://i.imgur.com/UEXCppy.png
http://i.imgur.com/mWsba0c.png

On my old HP49g I often used "solvesys 49 (solvesys.lib)" program(simultaneous nonlinear equation solver) for similar more complicated equations and was very satisfied. Is there a possibility to make it work with HP Prime?
Sorry for mistakes but English is not my native language.
Thanks in andvance.