Q-1) Complete the last column of the table.

Sr. No. Equation

a+4=0

2 a+5=0

3 a+4=0

4 a-8=1

5 a-8=1

6 5a = 25

7 5a = 25

8 5a = 25

9 x/3 = 3

10 x/3 = 3

11 x/3 = 3

Ans.)

1. a+ 4 = 0, a= 4

L.H.S=a+4

By putting, a= 4;

Value

a=4

a=O

a=-4

a=8

a=9

a=O

a=5

a=-5

x=-9

x=O

x=9

L.H.S = 4+4 = 8 -::fa R.H.S

Therefore, "No", the equation is not satisfied.

2. a + 5 = 0, a = 0

L.H.S =a+ 5

By putting, a= 0;

L.H.S = O+ 5 = 5 -::fa R.H.S

Therefore, "No", the equation is not satisfied.

3. a + 4 = 0, a = - 4

L.H.S =a+ 4

By putting, a= -4;

L.H.S = -4 + 4 = 0 = R.H.S

Therefore, "Yes", the equation is satisfied.

4. a -8 = 1, a= 8

L.H.S = a-8

By putting, a= 8;

Exercise 4.1

Say, whether the equation is satisfied. (Yes/No)

NCERT SOLUTIONS CLASS-VII MATHS

CHAPTER-4 SIMPLE EQUATIONS