Solve the following equation :

15 + x = 5x + 3

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Solution

15 + x = 5x + 3

$\Rightarrow 15 - 3 = 5 x - x \Rightarrow 12 = 4 x \Rightarrow \frac{12}{4} = x \Rightarrow 3 = x \Rightarrow x = 3$

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