Respuesta :

Simplify 2/3 - 1/7 to 11/21
10/21 + 11/21
Simplify 
 The answer is 1.
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.