If $a + b = c$ and $c = 12$ , find the value of $c - 2 a - 2 b$ .

- 24

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- 12

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12

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Solution

The correct option is C $- 12$
As given,
$a + b = c$ , $c = 12$
let, $x = c - 2 a - 2 b$
$x = a + b - 2 a - 2 b$
$x = - a - b$
$- x = a + b$
As, $a + b = c = 12$
Therefore $x = - 12$
Hence, option $B$ is correct.

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