NCERT MATHS class 7 chapter 4 Simple Equation Exercise 4.2 (Full)

NCERT MATHS class 7 chapter 4 Simple Equation Exercise 4.2 (Full)Here is a full description of NCERT Maths Class 7 Chapter 4: Simple Equations – Exercise 4.2: --- ✅ Chapter: Simple Equations ✅ Class: 7 ✅ Exercise: 4.2 ✅ Topic: Solving Simple Equations by Transposition Method --- ➤ Introduction of Exercise 4.2: In this exercise, you will practice solving simple linear equations using the method of transposition, i.e., moving terms from one side of the equation to the other by changing their sign. The general steps are: 1. Remove brackets (if any). 2. Collect like terms on one side. 3. Transpose constant terms to the opposite side by changing their signs. 4. Solve for the unknown (variable). --- ✅ Examples from Exercise 4.2: --- ▶ Example 1: Equation: x + 5 = 12 Solution: To isolate x, subtract 5 from both sides: x + 5 - 5 = 12 - 5 → x = 7 --- ▶ Example 2: Equation: x - 7 = 10 Solution: Add 7 on both sides: x - 7 + 7 = 10 + 7 → x = 17 --- ▶ Example 3: Equation: 5x = 20 Solution: Divide both sides by 5: x = 20 ÷ 5 → x = 4 --- ▶ Example 4: Equation: x/3 = 9 Solution: Multiply both sides by 3: x = 9 × 3 → x = 27 --- ▶ Example 5: Equation: 3x + 4 = 19 Solution: Step 1: Subtract 4 from both sides → 3x = 15 Step 2: Divide by 3 → x = 15 ÷ 3 → x = 5 --- ▶ Example 6: Equation: 2x - 5 = 9 Solution: Step 1: Add 5 to both sides → 2x = 14 Step 2: Divide by 2 → x = 14 ÷ 2 → x = 7 --- ✅ Key Learning Points: Transposition method helps to move terms from one side to another with sign change. Always simplify both sides step by step. Check your solution by substituting the value of x back into the original equation. --- ✅ Tip for Students: Always perform inverse operations carefully: Addition ↔ Subtraction Multiplication ↔ Division After solving, verify the answer by substituting the value of the variable into the original equation to ensure correctness. --- Here are relevant hashtags you can use for social media posts related to NCERT Class 7 Maths Chapter 4 – Simple Equations Exercise 4.2: --- ✅ Hashtags: #NCERTMaths #Class7Maths #SimpleEquations #MathsExercise #AlgebraBasics #StudyWithMe #MathPractice #Education #TranspositionMethod #MathSolutions #MathHelp #NCERTSolutions #LearnMaths #SchoolStudies #ExamPrep #Class7Study #MathTips #EquationSolving #Mathematics #StudentsOfIndia ---