Решите уравнение плиз: 5 67 * (2 14-0,25z)=0,41

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