In Smath and any CAS there is no push button "Solve", neither in Win.
Native Smath f(x) offers 3 solvers: roots, solve, FindRoots.
Two more are available: root [undocumented], Maple RootOf.
This Companion Treasury is a first brew, usable as is.

Jean ... Enjoy/comment

Solve TREASURY_00000 [Advection CREATE].sm (48.99 KiB) downloaded 914 time(s).
Solve TREASURY_000 [root, RootOf LECTURE].sm (114.45 KiB) downloaded 907 time(s).
Solve TREASURY_00 [Tridiagonal].sm (107.4 KiB) downloaded 824 time(s).
Solve TREASURY_1 [Iterate L, Lc].sm (267.67 KiB) downloaded 902 time(s).
Solve TREASURY_0 [General].sm (325.35 KiB) downloaded 881 time(s).
Solve TREASURY_0000 [Advection Anim].sm (1.4 MiB) downloaded 926 time(s).