Question

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

Answer 1

$b_{2}$ = $\frac{2A}{h}$ - $b_{1}$

multiply both sides by 2 to eliminate the fraction

($b_{1}$ + $b_{2}$ )h = 2A

divide both sides by h

$b_{1}$ + $b_{2}$ = $\frac{2A}{h}$

subtract $b_{1}$ from both sides

$b_{2}$ = $\frac{2A}{h}$ - $b_{1}$