Question

Solve log (7x+3) - log (x-3) = 1
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Answer 1

Answer:

x = 11

Step-by-step explanation:

logs are base 10?  Let's suppose yes...

log ( 7x + 3 ) - log ( x - 3 ) = 1

=> log ( 7x + 3 ) = 1 + log ( x - 3 ) = log 10 + log ( x - 3 ) = log 10(x - 3)

=> 7x + 3 = 10 ( x - 3 )

=> 7x + 3 = 10x - 30

=> 3x = 33

=> x = 11