Question 212818
Solve for b:
{{{(1/a)+(1/b) = c}}} Subtract {{{1/a}}} from both sides.
{{{1/b = c-(1/a)}}} Simplify the right side by multiplying the c by {{{a/a}}}.
{{{1/b = (a/a)c - 1/a}}} Simplify the right side.
{{{1/b = (ac-1)/a}}} Now invert both sides.
{{{b = a/(ac-1)}}}