The equation below shows the relationship between positive numbers \(a\), \(b\), \(x\), \(y\), and \(c\). Which of the following correctly expresses \(a\) in terms of \(b\), \(x\), \(y\), and \(c\)? $$ax+by=c$$

If you have difficulties with these types of problem, try replacing variables with numbers and anticipating the steps you would normally use.

Did this question seem familiar? You've probably done a similar rearrangement many times before, when changing a line in standard form to slope-intercept form: