NCERT Class 7 Mathematics Solutions: Chapter 4 – Simple Equations Exercise 4.2 Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Example of Two Simultaneous Equations Using Add and Subtract …

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

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

Answer:

(a)

Adding to both sides of the given equation

(b)

Subtracting from both sides of the given equation

(c)

Adding both sides of the given equation

(d)

Subtracting from both sides of the given equation:

(e)

Adding to both sides of the given equation

(f)

Adding to both sides of the given equation

(g)

Subtracting from both sides of the given equation

(h)

Subtracting from both sides of the given equation