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Ex 4.4, 2 (a) - Chapter 4 Class 7 Simple Equations

Last updated at Sept. 2, 2021 by

Ex 4.4, 2 - Solve (a) The teacher tells the class that highest marks

Ex 4.4, 2 - Chapter 4 Class 7 Simple Equations - Part 2

 

 

 

 

Transcript

Ex 4.4, 2 Solve the following: (a) The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. What is the lowest score?Let lowest marks = x Given that, Highest marks = twice the lower marks plus 7 Highest marks = 2x + 7 Also, Highest marks = 87 Thus, 2x + 7 = 87 2x = 87 − 7 2x = 80 x = 80/2 x = 40 ∴ Lowest marks = 40

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.