Решите уравнение плиз: 5 6\7 * (2 1\4-0,25z)=0,41

56/7*(21/4-0.25z) = 0.41 8*(21/4-1/4z) = 0.4142-2z = 0.41-2z = 0.41-42-2z = -41.592z = 41.59z = 41.59/2z = 20.79