Question 72686
Solve for {{{b[1]}}}
{{{A = (1/2)h(b[1]+b[2])}}} Multiply both sides by 2.
{{{2A = h(b[1]+b[2])}}} Divide both sides by h.
{{{2A/h = b[1]+b[2]}}} Finally, subtract {{{b[2]}}} from both sides.
{{{2A/h - b[2] = b[1]}}}
The answer:
{{{b[1] = 2A/h - b[2]}}}