Engineering Board Exam Reviewer · Exponents, Radicals, and Exponential Equations · medium

Solve for x: 9x=27x-1.

1. 3
2. -3
3. 1
4. 2

Answer

A. 3

Solution

Write both sides with base 3: 32x=33(x-1) 2x=3x-3 x=3.

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