trying to get general solution for differential equation but keep getting error

syms dx1  gensoln eq1 

eq1='dx1-x2/2+20' ;
gensoln = dsolve(eq1,'t');

[James Tursa]

What is the DE you are trying to solve?

Answer 1

[madhan ravi]

See https://in.mathworks.com/help/symbolic/solve-a-single-differential-equation.html for better understanding and how to declare variables as a function of another , below is an example on how to solve but not sure if that's what you want to do but generall that's how you solve an ode symbollically,...

syms x1(t)  x2(t)
dx1=diff(x1);
ode=0==dx1-x2/2+20 ;
gensoln = dsolve(ode);