SOLUTION: log base 7 of x =2

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: log base 7 of x =2      Log On


   



Question 1047866: log base 7 of x =2
Found 2 solutions by Boreal, MathLover1:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
log7 (x)=2
x=49
7^2=49.
Can remember this by using log10
log10(100)=2, because 10^2 is l00. The exponent is on the right side of the equation.

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

log%287%2Cx%29=2+......change to base 10
log+%28%28x%29%29+%2Flog+%28%287%29%29=2
+log+%28%28x%29%29+=2+log+%287%29
log+%28%28x%29%29+=+log+%28%287%5E2%29%29....if log same, we have
x=49