Saturday 21 May 2016

LOGARITHMS 3


If log7(3x + 19)=2; find x

   Solution

log7(3x + 19)=2

 (3x + 19)=72   
                      
 3x + 19=49


3x = 49 – 19

3x =  30


3x =  30   
3         3

x = 10


Hence x = 10


TRY THIS...............



If log2(3x - 28) = 5; find x

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