| Answer | Mark | Comments |
|---|
| Alternative method 1 |
| \(3ef = 5e + 4\) or \(ef - \dfrac{5e}{3} = \dfrac{4}{3}\) | M1 | |
| \(e(3f - 5) = 4\) or \(e\left(f - \dfrac{5}{3}\right) = \dfrac{4}{3}\) | M1dep | oe where they are one step away from answer |
| \(e = \dfrac{4}{3f - 5}\) | A1 | oe eg \(e = \dfrac{\frac{4}{3}}{\left(f - \frac{5}{3}\right)}\) or \(e = \dfrac{-4}{5 - 3f}\) |
| Alternative method 2 |
| \(3f = 5 + \dfrac{4}{e}\) | M1 | |
| \(\dfrac{4}{e} = 3f - 5\) | M1dep | oe where they are one step away from answer |
| \(e = \dfrac{4}{3f - 5}\) | A1 | oe eg \(e = \dfrac{\frac{4}{3}}{\left(f - \frac{5}{3}\right)}\) or \(e = \dfrac{-4}{5 - 3f}\) |
