Respuesta :

Space

Answer:

We add 11 to both sides

General Formulas and Concepts:

Pre-Algebra

  • Equality Properties

Step-by-step explanation:

Step 1: Define equation

x - 11 = 9

Step 2: Identify

We need to isolate x, and to do so, we have to get rid of the -11 on the left side. We should add 11 to both sides to isolate x and to get our answer.

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