why we take the value as x

Shivam Kewlani's image
Shivam Kewlani
July 25, 2016, 7:23 p.m.

Answers!

Davneet Singh's image
Davneet Singh
July 25, 2016, 7:38 p.m.

In which question Shivam?

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Shivam Kewlani's image