Make x the subject of the following formula: x/2 + 3 = y - 2

To make x the subject of the formula, we simply want to have x on its own on one side of the equals sign. So we need to remove any numbers on the same side as x. A key rule to remember is that everything we do to the left hand side we must also do exactly the same to the right hand side. Firstly, we want to remove the 3 on the left hand side. To do this we subtract 3 from both sides of the equation to givex/2 + 3 - 3 = y - 2 -3 which is x/2 = y - 5. Now we want to remove the divide by 2 on the left hand side. To do this we need to do the opposite of division which is multiplication. So we multiply both sides of the equation by 2 to give: x = (y - 5)*2. We use the brackets as both y and -5 are multiplied by 2. Expanding the brackets then gives usx = 2y - 10