Question 15092
We have C = 1-{{{A/a}}}
To solve for A add {{{A/a}}} to both sides first
C + {{{A/a}}} = 1.  Now subtract C
{{{A/a}}} = 1-C. Now multiply a to both sides.
A = a * (1-C)
To solve for a, we take this last equation and divide both sides by (1-c) to get
a = {{{A/(1-C)}}}