Question
Find an integer x such that:
x + 1 = 0
x + 1 = 0
✓
Answer
x +1 = 0
⇒ x + 1 - 1 = 0 - 1 [subtract -1 on both sides]
⇒ x = -1
⇒ x + 1 - 1 = 0 - 1 [subtract -1 on both sides]
⇒ x = -1
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