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Howto Derive Equations

Solving for 1 unknown in terms of known.

Given 3 Capacitors in series, find equivalent capacitance in computer usable terms.
Figure1
We will need to solve for Ceq.
If you multiply anything by one, we know that it still the same. Since we have C1,C2,C3 all in separate denominators, we need a common denominator. We find the common denominator By multiplying all the denominators together, we get Figure3Figure3.
We know by math that anything divided by itself is 1. So we can make the manipulation
Figure4
If we multiply each term by the above expression we would get something like.
Figure5
Use Cancellation and simplify
Figure6
Notice the common denominator, apply fraction rules.
Figure7
Solve for C, take reciprocal of both sides.
Figure8
Use sets of parenthesis to show as 1 line equation, as one would enter into a calculator

Ceq=(C1*C2*C3)/(C2*C3+C1*C3+C1*C2)