Question

Total Swans ( k x ).
( begin{aligned} therefore &left.mid frac{7}{2} times sqrt{x}right}+2=x & sqrt{x}=(x-2) times frac{2}{7} & x=frac{4}{49}left(x^{2}+4-4 xright) & 4 x^{2}-65 x+16=0 & x=16,74 end{aligned} )

# Out of a group of swans, times the square root of the number are playing on the shore of a tank. The two remaining ones are playing with amorous fight, in the water. What is the total number of swans?

Solution