Question

I'm not sure if I worked out no. 3 part b) correctly

Answer 1

To make b the subject of the equation, we need to get b by itself on one side. First, I would multiply both sides by a-b, giving ya - yb = a. Then, I'd subtract ya from both sides, leaving -by = a - ya, then finally divide by -y, giving $b = \frac{a}{y} - \frac{ya}{-y}$, which is equal to $\frac{a}{y} + a$