Ex 4.3, 4 - Chapter 4 Class 7 Simple Equations

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Ex 4.3, 4 Solve the following riddle: I am a number, Tell my identity! Take me seven times over And add a fifty! To reach a triple century You still need fortyLet the number be x Given that, Adding seven times over x and 50 = triple century − 40 7x + 50 = 300 − 40 7x + 50 = 260 7x = 260 − 50 7x = 210 x = 210/7 x = 30 So, number is 30

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo