In the algebraic equation $2 - x = 5$ , the value of unknown is

- 4

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3

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- 3

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Solution

The correct option is C $- 3$
Given algebraic equation $2 - x = 5$
Add $x$ on both sides
$\Rightarrow 2 - x + x = 5 + x$
$\Rightarrow 2 = 5 + x$
Subtract $5$ from both sides
$\Rightarrow 2 - 5 = 5 + x - 5$
$\Rightarrow - 3 = x or x = - 3$

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