Question

(48/(20-x))+(48/(20+x))=5

Answer 1

48*(20-x)+48*(20+x)=5(20+x)(20-x)

48(20-x+20+x)=5(400-x²)

48*40=5(400-x²)

48*8=400-x²

400-x²=384

x²=16

x=±4