W equals wing lift.

D subscript W equals distance.

T equals tail lift.

D subscript T equals distance.

CG equals center of gravity.

For trimmed flight, no rotation about or around CG.

Equation: (D subscript w multiplied by W) plus (D subscript T multiplied by
T) equals zero.

(distance from CG multiplied by Lift of Wing) plus distance from CD multiplied
by Lift of Tail) equals zero.