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Solving an Equation

Question

The value of $x$ if $\frac{x - 1}{x + 1} = 3$

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Solution

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$\frac{x - 1}{x + 1} = 3$

$\Rightarrow$ $x - 1 = 3 x + 3$

$\Rightarrow$ $2 x + 4 = 0$

$\Rightarrow$ $x = - 2$

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