## Algebra: A Combined Approach (4th Edition)

h = $\frac{S - 4lw}{2w}$
Solve for h by isolating it to one side: S = 4lw + 2wh Subtract 4lw: S - 4lw = 2wh Divide both sides by 2w: $\frac{S - 4lw}{2w}$ = h