In the simple sample equation that follows, note how the equation is followed by a comma and is presented as a grammatical member of a smooth, simple, fluid sentence. Note also the use of semicolons and commas to separate members of the equation as each is described.
The duration of the heating cycle can be approximated by the equation
t = 2RtCt,
where t = cycle time, s; Rt= resistance, Ω and Ct = capacitance, F.