We are given the equation 6.2n - 2.7n = 85 + 45, and we are told to solve for the variable 'n'. First off, we can combine like terms on both sides of the equation, giving us 2.5n = 130. Next, we divide both sides by 2.5, so to isolate the variable we are solving for n. This gives us n = 52. Therefore, the answer to this problem is A. 52. Hope this has come of assistance to you and have a great day!