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OK, this is different-the spacing is before P, not after it, but this a common alignment style.
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In a simple case where you have a system of equations and you want to align them to the equals sign (as might be the case here), the following trick works: What can be done, and how it is done, depends on the context and purpose of formatting. Instead, use the “Matrix” tools or the “Bracket” tools there. Using Equation Tools, you cannot use the tab key to tabulate things.
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