Question

1.
Each equation is followed by the values of the variable. Decide whether
these values are the solutions of that equation.
(1) x - 4 = 3,
x = -1, 7, -7​

Answer 1

Answer:

x-4=3

put x=7

7-4=3

3=3

x=7 is right solution

Answer 2

Answer:

Given equation: x – 4 = 3 … (i)

Firstly, putting x = -1 in (i) we have

(-1) – 4 = 3

⇒ -5 ≠ 3

Thus, x = -1 is not a solution of the given equation.

Secondly, putting x = 7 in (i) we have

(7) – 4 = 3

⇒ 3 = 3

Thus, x = 7 is the solution of the given equation.

Lastly, putting x = -7 in (i) we have

(-7) – 4 = 3

⇒ -11 ≠ 3

Thus, x = -7 is not a solution of the given equation.