3 Variables - 2 Equations - A Unique Approach | Quantitative Aptitude | Ronak Shah

How to solve 3 Variables - 2 Equations . Let's look at A Unique Approach.

Question:
The cost of 5 pens, 7 pencils and 11 erasers is Rs. 111. The cost of 3 pens, 4 pencils and,5 erasers is Rs. 61. Find the cost (in Rs.) of 5 pens, 6 pencils and 3 erasers?

5P + 7Q + 11R = 111
3P + 4Q + 5R = 61
-----------------
5P + 6Q + 3R = ?

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You will frequently find equations based questions in the Quantitative Ability section of CAT exam. These questions can be solved easily after understanding some points and formula. Let's look at each one of them.

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#3equations2Variable, #algebra , #quantitativeaptitude

[shreyanshsrivastava]

Thank you for this approach sir. I remember I came across such question in mocks and I wasn't able to solve it even after spending 3 mins. This method seems robust and I think I can master such questions by solving 3-4 of similar type with your approach . Thanks a million sir ❤️

[SARTHAK]

Amazing approach. Faced this type of question in mocks but was unable to solve using hit and trial. Thank you very much for this!

[sohananajakhan]

Your approaches are far more easier sir...thank you❤️

[Garvit.]

I would like to thankyou sir from my bottom of my heart for such an wonderful video. I was confused with the topic, but after watching your video, I have 100% clarity of this concept now

[manvisingh]

Thank you so much sir for this trick, really helpful.

[speaktruth]

Sir mai aapko dil se pranam krti hu🙏🙏 This approach is great thank you so much sir ❤

[likhitanalam]

Thankyou for this helping us sir, by saying this approach. it is very helpful when unable to solve through hit and trail method.🙏

[hafeezgamers]

thank you for the approach sir used to do the hit and trail and was time consuming . thins one makes a lot of sense

[abbaspgw]

Sir, there is one more equation when numbers are in A.P. in this variety, please share it's approach also, thank you

[adityamanohar]

Thank you sir, hit and trial takes more time

[gopalsagar]

Always love your approach sir. thank you

[saikath]

Unacademy thank you for all your help and support and you have a team of best faculties bus thora App ka glitch wagera and suddenly disconnection wagera Tik kar do please

[prachisinha]

thank you so much for this video sir . . it was much needed 🙂😀

[samridhabarman]

Thank you sir. In the previous Time and work video pipe and cisterns was missed .can you complete these

[mathiseasypeasy]

Why we assumed that 5ax+3ay should be equal to 5a? Can you explain to me please

[JackRyan]

Thank you sir. Till date I was using trial and error and success rate was okayish. But now I am confident it will be 100%.

[abhinavsingh]

4x+3y+6z= 173000, 2x+5y+3z= 139000 ....find pls solve this with the mentioned method.. i'm not getting the ans

[rohitanshupatel]

Fake 3rd variable jb zero hi h is case me to koi b trick bta k bewakoof bnao dusra q batao jisme teeno variable exist krte ho tb pta chalega