%file name - first_order_linear_differential_equations.m

syms y(z);
ode = diff(y,x) == 2*x;   % define the differential equation
cond = y(0) == 3;         %initial condition
ySol(x) = dsolve(ode,cond);

% run the programe
% type the ySol(x) in the command window and  ENTER
%you get the answer