x+x20−53=0
x+\frac{20}{x} -53=0x+x20−53=0
\frac{x^{2}+20-53x }{x} =0xx2+20−53x =0
x^{2} +20-53x=0x2+20−53x=0
x^{2} -53x+20=0x2−53x+20=0
ответ: x=\frac{53+\sqrt{2729} } {2}x=253+2729
x=\frac{53-\sqrt{2729} }{2}x=253−2729
