SOLUTION: 1/x-8/21=3/7x

Algebra ->  Equations -> SOLUTION: 1/x-8/21=3/7x      Log On


   

Question 570823: 1/x-8/21=3/7x
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
%281%2Fx%29-%288%2F21%29=%283%2F7x%29
Add 8/21 to both sides of the equation
%281%2Fx%29=%283%2F7x%29%2B%288%2F21%29
add -(3/7x) to both sides
%281%2Fx%29-%283%2F7x%29=8%2F21
LCD = 7x
7-3=7x*8/21
4=56x/21
multiply by 21
84= 56x
/56
x=3/2
m.ananth@hotmail.ca