The problem asks us to solve the exponential equation $3^{2-x} = \frac{1}{27}$ for $x$, without using logarithms.

AlgebraExponential EquationsExponentsSolving Equations
2025/4/23

1. Problem Description

The problem asks us to solve the exponential equation 32x=1273^{2-x} = \frac{1}{27} for xx, without using logarithms.

2. Solution Steps

We need to express both sides of the equation with the same base.
Since 27=3327 = 3^3, we can write 127\frac{1}{27} as 133\frac{1}{3^3}.
Also, 133\frac{1}{3^3} can be written as 333^{-3}.
Thus, the equation becomes
32x=333^{2-x} = 3^{-3}.
Since the bases are the same, we can equate the exponents:
2x=32 - x = -3.
Now, we can solve for xx:
2x=32 - x = -3
x=32-x = -3 - 2
x=5-x = -5
x=5x = 5

3. Final Answer

x=5x = 5

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