Question

E = hf - w

w = ?

Answer 1

uh divide it?

Answer 2

While there are several ways in which you could do this, I'd start by adding w to both sides. Mind doing that?

Answer 3

w+e = hf?

Answer 4

And you're trying to isolate w. subtract e from both sides of your equation.

Answer 5

w = hf - e

Answer 6

And there you have it: your expression for w in terms of h, f and e.

Answer 7

tanks!

Answer 8

My great pleasure.