When you start a new line in solving an equation (or any math problem), is there a symbol you should start of with? I usually use an equal or therefore sign but sometimes it doesn't seem appropriate and I just end up using a little arrow Say I had to rearrange this equation (ab)/2 = c to make a the subject , what would I write in front of the first and subsequent lines of working? Just leave it blank? e.g. (ab)/2 = c <--- what goes here? (ab) = 2c..etc. etc..