Saturday, 4 September 2021

LOGARITHMS B4

 

If log3(10x + 7)=3; find x.

 

Solution

 

log3(10x + 7)=3

 

 (10x + 7)=33         

                                            

 10x + 7=27

 

10x = 27 – 7

 

10x =  20

 

10x202   

10      10

 

x = 2

 

Hence x = 2

 

TRY THIS…………….

 

If log3(5x + 1)=4; find x


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