[[_homogeneous, `class C`], _rational, [_Abel, `2nd type`, `class A`]]
Book solution method
Equation linear in the variables,
Mathematica ✓
cpu = 0.0184854 (sec), leaf count = 28
Maple ✓
cpu = 0.022 (sec), leaf count = 24
DSolve[3*(x + 2*y[x])*y'[x] == 1 - x - 2*y[x],y[x],x]
Mathematica raw output
{{y[x] -> -1 - x/2 - ProductLog[-E^(-1 - x/6 + C[1])]}}
Maple raw input
dsolve(3*(x+2*y(x))*diff(y(x),x) = 1-x-2*y(x), y(x),'implicit')
Maple raw output
-_C1-x-3*y(x)+3*ln(1+1/2*x+y(x)) = 0