OG详解-OG10 数学2 Q5

Choice A is correct. Dividing each side of the given equation by 7 yields m=2(n+p)7​​ .
Choice B is incorrect and may result from conceptual or calculation errors. Choice C is incorrect. This equation is equivalent to 7+m = 2(n+p), not 7m = 2(n+p). Choice D is incorrect and may result from conceptual or calculation errors.