I think question is make 'a' the subject Mathematically 2a=b => divide both sides by 2 2a/2 = b/2 So the answer is a=b/2
Hey Annet, It’s seem that the question you have asked is incomplete. However, please find the below general explanation to solve such problems in GCSE Maths; To make the subject of the formula, needs to be isolated. In the formula above, the letter is multiplied by . The inverse of multiplying by is dividing by , so divide both sides by to isolate . A = b h ÷ h ÷ h A h = b The letter is now by itself which means is now the subject of the formula.