Question
Find an integer x such that:
-3 + x = 0
-3 + x = 0
✓
Answer
-3 + x = 0
⇒ 3 - 3 + x = 0 + 3 [adding 3 on both sides]
x = 3
⇒ 3 - 3 + x = 0 + 3 [adding 3 on both sides]
x = 3
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