Example 9 - Solve the equation 2x + 1 = x - 3 - Chapter 4 - Examples

Example 9 - Chapter 4 Class 9 Linear Equations in Two Variables - Part 2

Example 9 - Chapter 4 Class 9 Linear Equations in Two Variables - Part 3

Example 9 - Chapter 4 Class 9 Linear Equations in Two Variables - Part 4

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Transcript

Question 5 Solve the equation 2x + 1 = x – 3, and represent the solution(s) on (i) the number line Number line is one variable In one variable, there is only x axis.(No y-axis) Solving 2x + 1 = x – 3 2x – x = –3 – 1 x = – 4 Here, 2x + 1 = x – 3 is a point Hence, we can say that in one variable 2x + 1 = x – 3 is a point Question 5 Solve the equation 2x + 1 = x – 3, and represent the solution(s) on (ii) the Cartesian plane. In Cartesian plane , we have x and y axis Hence, writing equation 2x + 1 = x – 3 in terms of x & y 2x + 1 = x – 3 2x – x = –3 – 1 x = –4 x + 0 = – 4 x + 0y = –4 Plotting points on graph Comparison

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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.