х+2 3/13 =10 8/39
х=10 8/39 - 2 3/13
х=10 8/39 - 2 9/39
х=8 8/39 - 9/39
х=7 47/39 - 9/39
х=7 38/39
5 1/13 ÷ 22= 66/13:22=(66*1)/13*22=
=3/13