# Ex 4.4, 4 - Chapter 4 Class 7 Simple Equations

Last updated at July 2, 2018 by Teachoo

Last updated at July 2, 2018 by Teachoo

Transcript

Ex 4.4, 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 So, 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

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.