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प्रश्न
Nine added to thrice a whole number gives 45. Find the number
उत्तर
Let the whole number required to be x.
Thrice the whole number = 3x
Nine added to it = 3x + 9
Given 3x + 9 = 45
3x + 9 – 9 = 45 – 9 ...[Subtracting 9 on both sides]
3x = 36
`(3x)/3 = 36/3`
x = 12
∴ The required whole number is 12
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