Решите уравнение пж (2z-1)/4 = (3z+3)/5

1/2z-1/4=3/5z+3/5 1/2z-3/5z=3/5+1/4 5/10z-6/10z=12/20+5/20 -1/10z=17/20 z=-(17/20/1/10) z=-(17/20*10/1) z=-(17/2) z= -8.5