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प्रश्न
6b + 40 = – 100 – b
उत्तर
6b + 40 = – 100 – b
⇒ 6b + b = - 100 - 40
⇒ 7b = - 140
⇒ b = `(-140)/7 = -20`
∴ b = - 20
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