Simplify:
$x - [y - {x - (y - 1) - 2 x}]$

2 y + 1

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- 2 y + 1

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2 x + y - 1

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2 x - y - 1

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Solution

The correct option is B $- 2 y + 1$
On simplified, we have
$x - [y - {x - (y - 1) - 2 x}]$
$= x - [y - {x - y + 1 - 2 x}]$
= $x - [y - {- x - y + 1}] = x - [y + x + y - 1]$
= $x - [2 y + x - 1] = x - 2 y - x + 1 = - 2 y + 1$
Hence, simplified form of the given expression is $- 2 y + 1$ .

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