Question

Solve A=h/2(b1 + b2) for h. Is this like the one before? We are a bit confused.

Answer 1

We know:\[
\begin{align}
A&=\frac{h(b_1+b_2)}{2}\implies\\
2A&=h(b_1+b_2)\implies\\
\frac{2A}{b_1+b_2}&=h
\end{align}
\]And, we are done.