Solve the following equation.
$3 x + 2 (x + 2) = 20 - (2 x - 5)$ .

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Solution

$\begin{matrix} \Rightarrow 3 x + 2 x + 4 = 20 - 2 x + 5 \Rightarrow 5 x + 4 = 25 - 2 x \Rightarrow 7 x = 21 \Rightarrow x = 3 \end{matrix}$

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Solve each of the following equations and also verify your solution :

$\frac{7}{2} x - \frac{5}{2} x = \frac{20}{3} x + 10$

Solve the following equation : $3 x + 2 (x + 2) = 20 (2 x - 5)$

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