SOLUTION: Solve: log(x+7)=1-logx
Algebra
->
Logarithm Solvers, Trainers and Word Problems
-> SOLUTION: Solve: log(x+7)=1-logx
Log On
Algebra: Logarithm
Section
Solvers
Solvers
Lessons
Lessons
Answers archive
Answers
Click here to see ALL problems on logarithm
Question 170477
:
Solve:
log(x+7)=1-logx
Answer by
stanbon(75887)
(
Show Source
):
You can
put this solution on YOUR website!
log(x+7)=1-logx
log[x(x+7)] = 1
x^2+7x=10
x^2+7x-10 = 0
x = [-7 +- sqrt(7^2 -4*-10)]/2
x = [-7 +- sqrt(89)]/2
Positive solution:
x = [-7 + sqrt(89)]/2
x = 1.216991
=================
Cheers,
Stan H.