Question

x = 4 is a solution of the equation
a) 4x + 4 = 4x
b) 3(x - 3 ) = 5(2x + 1)
c) 3x - 6 = 3
d) 4x -2 = 3x + 2​

Answer 1

Answer:

d) 4x - 2 = 3x + 2

Step-by-step explanation:

4x - 2 = 3x + 2

= 4x - 3x = 2 + 2

∴ x = 4

Answer 2

Answer:

a) 4x + 4 = 4x

or, 4×4 + 4 = 4×4

or, 16+4 = 16 (incorrect)

b) 3(x - 3 ) = 5(2x + 1)

or, 3(4-3) = 5(2×4+1)

or, 3 = 5×9 (incorrect)

c) 3x - 6 = 3

or, 3×4 -6 = 3

or, 12-6=3 (incorrect)

d) 4x -2 = 3x + 2

or, 4×4 -2 = 3×4 +2

or, 16-2 = 12+2

or, 14 = 14 (correct)

Step-by-step explanation:

Option D is correct