2/3+6/7-10/14= A 37/21 B 47/21 C 17/21 D 27/21

2/3 + 6/7 - 10/14
= 2/3 + (6/7 - 5/7)
= 2/3 + 1/7
= 14/21 + 3/21
= 17/21 (C) ✔

2/3 + 6/7 - 10/14 = ....
cara :
cari kpknya = 42
(2/3 + 6/7) - 10/14
= (28/42 + 36/42) - 30/42
= 64/42 - 30/42
= 34/42
= 17/21

semoga membantu