Thursday, 25 September 2014

`27^(4x-1)=9^(3x+8)` Solve the equation.

`27^(4x-1)=9^(3x+8)`


To solve, factor the 9 and 27.


`(3^3)^(4x-1)=(3^2)^(3x+8)`


To simplify each side, apply the exponent rule `(a^m)^n=a^(m*n)` .


`3^(3*(4x-1))=3^(2*(3x+8))`


`3^(12x-3)=3^(6x+16)`


Since both sides have the same base, to solve for the value of x, set the exponent at the left equal to the exponent at the right.


`12x-3=6x+16`


`12x-6x=3+16`


`6x=19`


`x=19/6`


Therefore, the solution is  `x = 19/6` .

`27^(4x-1)=9^(3x+8)`


To solve, factor the 9 and 27.


`(3^3)^(4x-1)=(3^2)^(3x+8)`


To simplify each side, apply the exponent rule `(a^m)^n=a^(m*n)` .


`3^(3*(4x-1))=3^(2*(3x+8))`


`3^(12x-3)=3^(6x+16)`


Since both sides have the same base, to solve for the value of x, set the exponent at the left equal to the exponent at the right.


`12x-3=6x+16`


`12x-6x=3+16`


`6x=19`


`x=19/6`


Therefore, the solution is  `x = 19/6` .

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