(1/4+3/4x) :0/45=25/36

1/4*20/9+3/4x*20/9=25/36 80/9+60/36x=25/36 60/36x=25/36-80/9 60/36x=(25-320)/36 60/36x = - 295/36 x = - 295/36*36/60 = -295/60 = -59/12 = -4 11/12