R²+R³+R⁴+R⁵ = ( R²R³R⁴R⁵ ) : ( R²+R³+R⁴+R⁵ ) = 144 : 19 = 7.6 Ом
R¹ + R⁶ = 4 + 4 = 8 Ом
R¹+R²+R³+R⁴+R⁵+R⁶ = 8 + 7.6 = 15.6 Ом
R²+R³+R⁴+R⁵ = ( R²R³R⁴R⁵ ) : ( R²+R³+R⁴+R⁵ ) = 144 : 19 = 7.6 Ом
R¹ + R⁶ = 4 + 4 = 8 Ом
R¹+R²+R³+R⁴+R⁵+R⁶ = 8 + 7.6 = 15.6 Ом