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Ex 4.3, 2 (a) - Chapter 4 Class 7 Simple Equations

Last updated at July 3, 2023 by

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Ex 4.3, 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 has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.