Answer:
1/15
Step-by-step explanation:
(5/7 - 1). [2/3 + (1/6 - 1/9), 18/5 + 1/15] - (2/7 + 1/3). (-7/13)
Use order of operations; PEMDAS.
Start with the inner parentheses:-
= (5/7 - 1). [2/3 + 1/18. 18/5+ 1/15] - (2/7 + 1/3). (-7/13). Now the other parentheses:-
= (-2/7). ( 2/3 + 1/5 + 1/15) - (13/21).(-7/13)
= -2/7 . 14/15 + 7/21
= -2/7 . 14/15 + 1/3
= -4/15 + 1/3
= 1/15 (answer)
