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What are the solutions to the equation ⎮x⎮= 8-3x?

A) The two valid solutions are x = 2 and x = 4.

B) The two extraneous solutions are x = 2 and x = 4.

C) The valid solution is x = 2, and the extraneous solution is x = 4.

D) The valid solution is x = 4, and the extraneous solution is x = 2.

Respuesta :

nobillionaireNobley
x = 8 - 3x . . . . . . . . (1)
-x = 8 - 3x . . . . . . . .(2)
From (1), 4x = 8
x = 2
From (2), 2x = 8
x = 4

Putting x = 2 in the original equation:
⎮2⎮= 8-3(2)
2 = 8 - 6
2 = 2

Putting x = 4 in the original equation:
⎮4⎮= 8-3(4)
4 = 8 - 12
4 = -4

Therefore, the valid solution is x = 2, and the extraneous solution is x = 4

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