Question 17A square is divided into three rectangles of widths $w_1,w_2,w_3$, as shown. If $w_1+w_3=w_2$ and the areas of the shaded regions $A,B,C$ are $8\text{ cm}^2,x\text{ cm}^2,2\text{ cm}^2$ respectively, find the value of $x$.
