how to get x for : (ln(x)/0.2198)+1/(125.6*x)+6.88737578=0
These two answers are for x as you have it written down:
(ln(x)/0.2198)+1/(125.6*x)+6.88737578=0
x = 0.000259537
x = 0.218305
But if you meant to write it like this:
(ln(x)/0.2198)+1/[(125.6*x)+6.88737578]=0, then the value of x is:
x = 0.99834
