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प्रश्न
9x – ______ = –21 has the solution (–2)
उत्तर
9x – 3 = –21 has the solution (–2)
Explanation:
Let missing number be p.
9x – p = –21
`\implies` 9(–2) – p = –21
`\implies` –18 – p = –21
`\implies` –p = –21 + 18
`\implies` –p = –3
`\implies` p = 3
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