SOLUTION: I'm having trouble with this text book question can you show me how to solve it log(3x-7)=21

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: I'm having trouble with this text book question can you show me how to solve it log(3x-7)=21      Log On


   

Question 22906: I'm having trouble with this text book question can you show me how to solve it
log(3x-7)=21
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Recall that:
log%28b%2CM%29=x means: b%5Ex+=+M Applying this to your problem:
log%2810%2C%283x-7%29%29+=+21 means:
10%5E21+=+%283x-7%29 Add 7 to both sides.
10%5E21+%2B+7+=+3x Finally, divide both sides by 3.
x+=+%2810%5E21+%2B+7%29%2F3