Х+1/3 : 1/2=4/5
х+2/3=4/5
х=4/5-2/3
х=2/15
Проверка: 2/15+1/3:1/2=4/5
2/15+2/3=4/5
12/15=4/5
4/5=4/5
х+1/3 / 1/2=4/5
x+2/3=4/5
x=2/15
Х+1/3 : 1/2=4/5
х+2/3=4/5
х=4/5-2/3
х=2/15
Проверка: 2/15+1/3:1/2=4/5
2/15+2/3=4/5
12/15=4/5
4/5=4/5
х+1/3 / 1/2=4/5
x+2/3=4/5
x=2/15