Решите линейное уравнение:

\(\displaystyle 0{,}5\left(\frac{1}{4}z+0\left(\frac{2}{21}z+0{,}13-\frac{3}{4}(2{,}4z+101)\right)+2{,}1\right)-5z+1=0\)

\(\displaystyle z=\)[ ]