NCERT Class 7 Mathematics Solutions: Chapter 4 –Simple Equations Exercise 4.2 Part 1

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Example of two simultaneous equations using add and subtract …

Example of Two Simultaneous Equations

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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