# Chapter 4 Simple Equations Class 7 Notes Maths

**Chapter 4 Simple Equations Class 7 Notes Maths**is given here that will provide a quick glimpse of the chapter and improve the learning experience. You will understand the various factors through which one can improve their efficiency and eventually scores higher in the exam.Â Class 7 Maths Revision Notes will makes it easier for the students to comprehend the concepts due to use of easy language. It is quite easy to retain the answers once you are fully aware of the concept thus notes can be beneficial for you.Â Also, NCERT Solutions for Class 7 Chapter 4 Maths will help in improving the student's experience.

**Equation**

â€¢Â An equation is a condition on a variable. A variable takes on different numerical values; its value is not fixed. Variables are denoted usually by letters of the alphabets, such as x, y, z, l, m, n, p, etc.

â€¢ An equation remains the same, when the expressions on the left and on the right are interchanged. This property is useful in solving equations.

**Solving an Equation**

**Systematic Method**

â€¢ The same quantity can be added to both sides of an equation without changing the equality.

â€¢ The same quantity can be subtracted from both sides of an equation without changing the equality.

â€¢ Both sides of an equation may be multiplied by the same non-zero number without changing the equality.

â€¢ Both sides of an equation may be divided by the same non-zero number without changing the equality.

**Transposition Method**

â€¢ We can transfer (transpose) a term from one side to the other by changing its plus (+) sign to minus (-) sign or from minus sign to plus sign. This does not effect the equality of the statement.

â€¢ Transposing a number is the same as adding or subtracting the number from both sides.

â€¢ Transposition of an expression can be carried out in the same way as the transposition of a term.