Step 1 ⇒ x - 3 = 3 (x + 3)

Step 2 ⇒ x - 3 = 3x + 9

Step 3 ⇒ x = 3x + 12

Step 4 ⇒ - 2x = 12

Step 5 ⇒ x = - 6

Identify the property of equality which yields Step 5.

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