OG详解-OG2 数学1 Q11

Choice B is correct. Multiplying both sides of the given equation by 4 yields (4)(4x +2)=(4 )(12), or 16x +8= 48. Therefore, the value of 16x +8 is 48.
Choice A is incorrect and may result from conceptual or calculation errors. 
Choice C is incorrect and may result from conceptual or calculation errors. 
Choice D is incorrect and may result from conceptual or calculation errors.