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