Friday, May 10, 2013

9^2x = 27^(3x-2) find x.

9^2x = 27^(3x-2)


To solve for
x, we will use the exponent properties to find x.


First we
will rewrite the bases as powers of prime numbers.


We know
that:


9 = 3^2


27 =
3^3


Let us
substitute.


==> 3^2)^2x =
(3^3)^(3x-2)


Now we know that x^a^b =
x^ab


==> 3^(2*2x) =
3^(3*(3x-2)


==> 3^(4x) =
3^(9x-6)


Now that the bases are equal, then the powers are
equal too.


==> 4x = 9x
-6


==> -5x =
-6


==> x =
6/5

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