Example 3 Here is another equation with two variables (or unknowns) d + e = 18 In this equation, though, we are also told that the value of d is twice the value of e. The answer is: d = 12, e = 6 ...

Chapter 4 (Linear Equations in Two Variables) of Class 9 Maths NCERT Book can be downloaded from here in PDF format. Get the latest edition of the chapter along with the best-explained NCERT ...

Linear Equation: An equation which can be put in the form ax + by + c = 0, where a, b and c are Pair of Linear Equations in Two Variables, and a and b are not both zero, is called a linear ...

Learn how to solve equations with examples when 𝒙 is on one side with this BBC Bitesize Maths article. Maths revision for KS3 students between the ages of 11 and 14.