Hey there, Brainiac!
To start this off, let's subtract LW from both sides of the equation.
S - LW = WH + HL
Now, let's use the distributive property on WH+HL.
Using the distributive property, we can change that to H(W+L)
S - LW = H(W+L)
Now, to finish this off, let's divide both sides by (W+L)
[tex] \frac{S-LW}{W+L} = H[/tex]
That's your answer.
Have an awesome day! :)
~collinjun0827, Junior Moderator