If 3 x = 30 , what is the value of 3 x - 12 ?

Question

Accepted Answer

Choice B is correct. Subtracting 12 from each side of the given equation yields 3 x - 12 = 30 - 12 , or 3 x - 12 = 18 . Therefore, the value of 3 x - 12 is 18 . Choice A is incorrect. This is the value of x - 12 , not 3 x - 12 . Choice C is incorrect. This is the value of x + 12 , not 3 x - 12 . Choice D is incorrect. This is the value of 3 x + 12 , not 3 x - 12 .

Question if-3-x