3. $\frac{w - 2}{w}=\frac{3}{6}$

Explanation:

Step1: Cross - multiply

$6(w - 2)=3w$

Step2: Expand the left - hand side

$6w-12 = 3w$

Step3: Move terms with $w$ to one side

$6w-3w=12$

Step4: Simplify

$3w = 12$

Step5: Solve for $w$

$w=\frac{12}{3}=4$

Answer:

$4$