- log x= -1.8140, x=?

Question

how can i calculate x in this question?

Answer 1

-log(x) = -1.8140

 

1) Multiply the entire equation by -1.

 

log(x) = 1.8140

 

2) When the log is in base 10, the inverse of y = log(x) is y = 10^x.  Therefore, you can eliminate the log by performing the operation 10^(each side of the equation).  When you do this, you'll get:

 

10^(log(x)) = 10^(1.8140), which reduces to:

 

x = 10^(1.8140) = 65.16