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The Sum of two numbers is …

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The Sum of two numbers is 15 . And the sum of their reciprocal is 3/10 . Then, Find the numbers...???

Posted by Saurabh Singh Lodhi 6 years, 11 months ago

CBSE > Class 10 > Mathematics

7 answers

Rahul Raj 6 years, 11 months ago

Now Put x=15-y in second equation

Yogita Ingle 6 years, 11 months ago

Let one of the numbers be x.
Other number is (15 - x)
Sum of their reciprocals = 3/10
1/x + 1/(15 - x) = 3/10
(15 ) / (15x - x²) = 3/10
150 = 45x - 3x²
3x² - 45x + 150 = 0
x² - 15x + 50 = 0
(x - 10)(x - 5) = 0
x = 10 or 5
Therefore, the numbers are 10 and 5.
If x = 15

Rahul Raj 6 years, 11 months ago

Substitution method x = 15-y

Puja Sahoo? 6 years, 11 months ago

Solve the equations ( rahul, has given) , and using substitution method yu can get the answer............

Rahul Raj 6 years, 11 months ago

According to the question , x+y = 15 And 1/x+1/y = 3/10

Puja Sahoo? 6 years, 11 months ago

The numbers are, 5 and 10.......

Rahul Raj 6 years, 11 months ago

10 and 5

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CBSE > Class 10 > Mathematics

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Find the nature of quadratic equation x^2 +x -5 =0

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This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

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