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Sum of N Terms of an AP

Solve: 2x +...

Question

Solve: $2 x + 3 = 15$

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Solution

$2 x + 3 = 15$

$\Rightarrow 2 x = 15 - 3 = 12$

$\Rightarrow x = \frac{12}{2} = 6$

$∴ x = 6$

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