Answer
$b=\frac{A}{.5h}-B$
Work Step by Step
We are given that $A=.5(B+b)h$
To solve for b, divide both sides by .5h.
$\frac{A}{.5h}=B+b$
Subtract B from both sides of the equation.
$b=\frac{A}{.5h}-B$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.