Question
$5$ is the solution of the equation $3x + 2 = 17.$

Answer

Solve the equation for $x, 3x + 2 = 17$
$\Rightarrow3\text{x}=17-2[ $transposing $2$ to $RHS]$
$\Rightarrow\frac{3\text{x}}{3}=\frac{15}{3} [$dividing both sides by $3]$
$\Rightarrow\text{x}=5$

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