Respuesta :
10/21+(2/3-1/7)=1
10/21+ ( 2/3(7) =14/21 - 1/7(3)=3/21)
10/21+11/21=21/21
21/21 = 1
I hope this helps.
10/21+ ( 2/3(7) =14/21 - 1/7(3)=3/21)
10/21+11/21=21/21
21/21 = 1
I hope this helps.