Step-by-step explanation: Since you know the equation the first step is to set it equal to 0, so 1/2x+-3=0, from here you just solve using algebra, with the goal of getting x by itself. There are three good options with one that I would say is the best. You can multiply both sides of the equation by 2, subtract -3 from both sides or subtract 1/2x from both sides, if you don't understand that let me know. The best I would say is subtract -3 so both sides are positive. that leaves you with 1/2x=3. Can you tell what to do from here?
3x is the least common denominators because you need to be able to make sure all other denominators can go multiple into it. Since the rest are just x, the largest number of 3x would be the denominator you want.
