Thursday 30 April 2015

LOGARITHMS 19




If log5(3x + 12)=3; find x

   Solution

log5(3x + 12)=3

 (3x + 104)=53   
                      
 3x + 104=125


3x = 125 – 104

3x =  21


3x =  21   
3        3

X = 7


Hence x = 7

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

If log2(2x - 26)=3; find x

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