To solve for "l" in the equation "s = 1/2pl + b", we need to isolate "l" on one side of the equation.
First, we can simplify the right-hand side of the equation by multiplying 1/2 by p and by l:
s = 1/2pl + b
s = (pl/2) + b
Next, we can isolate the term containing "l" by subtracting "b" from both sides of the equation:
s - b = (pl/2)
Finally, we can isolate "l" by multiplying both sides of the equation by 2/p:
2(p/2)(s - b) = l
l = (2s - 2b)/p
Therefore, the solution for "l" is (2s - 2b)/p.