To begin, let's take a relatively simple example. Make x the subject of the formula: 4y + 2 = x - 4. x = 4y + 6. Make y the subject of the formula. 2y/5 - 3x = 2. TIP: Remember to put brackets around 2 + 3x because both the 2 and the 3x are being multiplied by 5. y = 5 + 15x/2.
