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$\dfrac{x}{2} = 8 \blue{\implies} x = 2 \times 8 \blue{\implies} x = \boxed{16}$

$\frac{X}{2}$ equals to 8

then 8 x 2 = 16

• And 16 divided by 2 is 8

that makes the equation true making the answer 8

$\dfrac x2=8$ ,multiply both sides by 2, $x=8\times2=16$

Besides,this is an algebra problem,not a calculus problem.