Question:If` 5^(x + 3) = (25)^(3x - 4),` then the value of x is : 

A `5/11` 
B `11/5` 
C `11/3` 
D `13/5` 

+ Answer
B 

+ Explanation
`5^(x + 3) = (25)^(3x - 4 )

`or 5^(x + 5) = 5^(2(3x - 4) or 5^(x + 5)`

`= 5^(6x - 8)`

`:. x + 3 = 6x - 8 or 5x = 11 or x = 11/5.`

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Irin Moni

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