OG详解-OG7 数学2 Q8

Choice C is correct. It’s given that 8x = 6. Multiplying each side of this equation by 9 yields 72x=54. Therefore, the value of 72x is 54.
Choice A is incorrect. This is the value of 4x, not 72x. Choice B is incorrect and may result from conceptual or calculation errors. Choice D is incorrect and may result from conceptual or calculation errors.