Question

2x - (y + {y - (x + 2y)}]​

Answer 1

Answer:

2x - (y + (y - (x + 2y)))

2x - (y + (y - x - 2y))

2x - (y + y - x - 2 y)

2x - y - y + x + 2y

2x + x - 2y + 2y

= 3x

Answer 2

Answer:

2x-[y+{y-(x+2y)}]

=2x-[y+{y-x-2y}]

=2x-[y+y-x-2y]

=2x-y-y+x+2y

=2x-2y+x+2y

=3x

$\boxed{3x} \: is \: the \: right \: answer.$