А-b+c при а=2/7;b=1/6;c=1/9.

Question

А-b+c при а=2/7;b=1/6;c=1/9.

Answer 1

А-b+c
2/7-1/6+1/9=2/7-1/6=12-7/42=5/42-1/9=45+42/378=87/378=29/126