Question 309329
Square dimensions : s x s
Rectangle dimensions : 5+s x s/2
The area of the square is,
{{{A=s^2}}}
The area of the rectangle is,
{{{A=(5+s)(s/2)}}}
The areas are equal,
{{{s^2=(5+s)(s/2)}}}
{{{2s^2=5s+s^2}}}
{{{s^2=5s}}}
{{{s=5}}}