Hi,

I think I'm a bit out of my depth in this forum so forgive me if I've posted in the wrong place - I'm studying accountancy and I have an equation from my study book which I don't understand - I don't know whether it's a differential equation, but I'd be very grateful if somebody could explain it to me.

It goes as follows:

1. 8 = x + 1.2(7-x)

2. 8 = x + 8.4 - 1.2x

3. 0.2x = 0.4

4. x = 2

Can anyone tell me how on earth they get from stage 2 to stage 3? Are there any general tips for how to deal with equations?

Many thanks

Dan