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प्रश्न
A whole number is increased by 7 and the new number so obtained is multiplied by 5; the result is 45. Find the whole number.
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उत्तर
Let the required whole number = x
Then (x + 7) × 5 = 45
`=> (("x" + 7) xx 5)/5 = 45/5` (Dividing by 5)
⇒ x + 7 = 9
⇒ x = 9 - 7
x = 2
∴ Required whole number = 2
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