NCERT Class 7 Mathematics Solutions: Chapter 4 –Simple Equations Exercise 4.2 Part 3

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Example of solving equation using adding and substract metho …

Example of Solving Equation Using Adding and Substract Metho …

1. Give first the step you will use to separate the variable and then solve the equations

(a)

(b)

(c)

(d)

Answer:

(a)

Step I: Adding both sides

Step II: Dividing both sides by .

(b)

Step I: Subtracting both sides

Step II: Dividing both sides by .

(c)

Step I: Multiplying both sides

Step II: Dividing both sides by

(d)

Step I: Multiplying both sides

Step II: Dividing both sides by