Ex 4.1

Chapter 4 Class 7 Simple Equations
Serial order wise

### Transcript

Ex 4.1, 3 Solve the following equations by trial and error method: (ii) 3m – 14 = 4 Putting m = 0 3m −14 = 4 3(0) −14 = 4 0 − 14 = 4 −14 = 4 It is not true. ∴ m = 0 is not a solution. Putting m = 1 3m −14 = 4 3(1) − 14 = 4 3 − 14 = 4 −11 = 4 It is not true. ∴ m = 1 is not a solution. Putting m = 2 3m −14 = 4 3(2) − 14 = 4 6 − 14 = 4 −8 = 4 It is not true. ∴ m = 2 is not a solution. Putting m = 3 3m −14 = 4 3(3) − 14 = 4 9 − 14 = 4 −5 = 4 It is not true. ∴ m = 3 is not a solution. Putting m = 4 3m −14 = 4 3(4) − 14 = 4 12 − 14 = 4 −2 = 4 It is not true. ∴ m = 4 is not a solution. Putting m = 5 3m −14 = 4 3(5) − 14 = 4 15 − 14 = 4 1 = 4 It is not true. ∴ m = 5 is not a solution. Putting m = 6 3m −14 = 4 3(6) − 14 = 4 18 − 14 = 4 4 = 4 It is true. ∴ m = 6 is a solution.

#### Davneet Singh

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, Social Science, Physics, Chemistry, Computer Science at Teachoo.