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Answer:

a = P - b - c

General Formulas and Concepts:

  • Order of Operations: BPEMDAS
  • Equality Properties

Step-by-step explanation:

Step 1: Define equation

P = a + b + c

Step 2: Solve for a

  1. Subtract b on both sides:                    P - b = a + c
  2. Subtract c on both sides:                     P - b - c = a
  3. Rewrite:                                                 a = P - b - c
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[tex]P = a + b + c[/tex]

[tex]a + b + c = P[/tex]

Subtract sides c

[tex]a + b + c - c = P - c[/tex]

[tex]a + b = P - c[/tex]

Subtract sides b

[tex]a + b - b = P - c - b[/tex]

[tex]a = P - b - c[/tex]

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