help plz

1/8   +  1/20  + 1/X   =   1/4

x = ajay time  

Find how long will Ajay take to finish the work alone ?​

Hello Guest!

$4(\frac{1}{8day}+\frac{1}{20day})=\frac{1}{x}\\ \frac{1}{2day}+\frac{1}{5day}=\frac{1}{x}\\ \frac{5+2}{10day}=\frac{1}{x}\\ x= \color{blue}\frac{10}{7}day$

$1\frac{3}{7}$ day it will be Ajay take to finish the work alone.​

  !