2/3:4/9х - 4/9+1/20=4/5 помогите решить

Question

2/3:4/9х - 4/9+1/20=4/5 помогите решить

Answer 1

2/3:4/9х - 4/9+1/20=4/52/3:4/9х = 4\5+4\9-1\20 = (180+80-9)\1802/3:4/9х = 251\180 4\9х = 2\3*180\251 = 251\270
х = 251\270*9\4
х = 251\120 = 2 11\120