If you live long enough (and well enough!),
then eventually you are going to have to solve for x. It's unavoidable.
Get used to it. Below are a variety of examples involving both
symbolic and numerical solutions of equations and systems of equations.
Enjoy!

Here are the functions and expressions.

`> `**restart;**

`> `**y1:=2*x+5;**

`> `**y2:=-x+10;**

`> `**y3:=x^3-x^2+x-2;**

`> `**f:=x->x^2-x-1;**

`> `**g:=x^2+y^2;**

Here are the solutions.

`> `**solve(y1=0, x);**

`> `**solve({y=y1,y=y2},{x,y});**

`> `**p:=solve(y3=0, x);**

`> `**p[1];**

`> `**evalf(p[1]);**

`> `**solve(f(x)=0, x);**

`> `**solve(g=1, y);**

And now, here are the floating point solutions (more or less).

`> `**fsolve(y1=0, x);**

`> `**fsolve({y=y1,y=y2},{x,y});**

`> `**fsolve(y3=0, x);**

`> `**fsolve(y3=0, x, complex);**

`> `**fsolve(y3=0, x, 0..2);**

`> `**fsolve(f(x)=0, x);**

`>`