SOLUTION: What is the value of x in the expression log (20-x) base 10=3 ?

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Question 844458: What is the value of x in the expression log (20-x) base 10=3 ?
Found 2 solutions by fcabanski, lwsshak3:
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
definition of logarithm: log(baseb) a = x --> b%5Ex+=+a


10%5E3+=+1000+=+20-x


x = -980


Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
What is the value of x in the expression log (20-x) base 10=3 ?
10^3=20-x (base(10) raised to log of number(3)=number(20-x))
x=20-1000
x=-980