Uncover valuable information and solutions with IDNLearn.com's extensive Q&A platform. Discover the reliable solutions you need with help from our comprehensive and accurate Q&A platform.

I have this weird question that has to do with linear equations (I think), and this is what it says. Let f(x) = 4x - 5 A. Find f(3) B. Find x when f(x) = -21 Can somebody help me understand this ? ?