If a2 b4 c5 what is a x c - 2 b?

Well, honey, if we're talking algebra here, we've got a = 2, b = 4, and c = 5. So, a x c - 2b would be 2 x 5 - 2 x 4, which simplifies to 10 - 8, giving you a final answer of 2. So, there you have it, darling, simple math with a side of sass!