Question

What does the ABC stand for in standard form Ax+By=C?

Answer 1

`Ax+By+C` is a generalized form (in fact the standard generalized form) for a linear equation
where `A, B, and C` are placeholders for constants (the `x` and `y` are variables).

The generalized form, `Ax+By+C`, includes equations such as
`color(white)("XXXXX")` `7x+3y=98`
`color(white)("XXXXX")` `(1)x+(-5)y=14`
`color(white)("XXXXX")` `9261x+83y=-7491`
`color(white)("XXXXX")` `color(white)("XXXXX")`any infinitely many others

By normal usage `A` should be an integer value which is not negative.