Question

Solve for h: a=1/2h(b1+b2)

Answer 1

$\frac{1}{2}h(b_1+b_2)=a\ \ \ \ \ \ |multiply\ both\ sides\ by\ 2\\\\h(b_1+b_2)=2a\ \ \ \ \ \ \ |divide\ both\ sides\ by\ (b_1+b_2)\\\\\boxed{h=\frac{2a}{b_1+b_2}}$Answer here