Question

2/3 : { 1/2 . [ 6/7 - ( 2/7 + 3/7 ) ] }

Answer 1

2/3 : { 1/2 • [ 6/7 - ( 2/7 + 3/7 ) ] }

2/3 : { 1/2 • [ 6/7 - ( 5/7 ) ] }

2/3 : { 1/2 • [ 6/7 - 5/7 ] }

2/3 : { 1/2 • 1/7 }

2/3 : 1/14

2/3 • 14/1

28/3

Espero ter ajudado, valeu! :)