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Your equation has two variables in it ... 'a' and 'x'. So the solution is a four-step process:

1). Get another independent equation that relates the same two variables.

2). Solve one of the equations for one of the variables.

3). Substitute that into the other equation, yielding an equation in a single variable.

Solve that one for the single variable.

4). Substitute that value back into the first equation, and solve it for the second variable.

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Q: How do you solve log sub 9 parenthesis a over 27 closed parenthesis equals x minus 2?
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