Math, asked by devprasadkjh55, 7 months ago

वह संख्या निकाले जिसमें से 20 घटाने पर वह अपने व्युत्क्रम की 69 गुनी होती है​

Answers

Answered by rahulatalkha
1

Step-by-step explanation:

number =x

x - 20 =  \frac{1}{x}  \times 69

x - 20 =  \frac{69}{x}

 {x}^{2}  - 20x - 69 = 0 \\  {x}^{2}   + 3x - 23x - 69 = 0

x(x + 3) - 23(x + 3) = 0

(x  + 3)(x - 23) = 0

ie \\ (x - 23) = 0 \\ x = 23

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