The formulas used by electricians to determine missing values for various
quantities are like recipes. The technique of solution is to enter the known
quantities in the formula where they go. Then perform the mathematical
operations as needed. When the calculation is complete, the desired quantity is
By strictly following the formula, and adhering to math procedures paying
attention to order of operation, each result will be correct.
The difficulty encountered in substitution algebra may be in finding the
correct formula which will allow the electrician to use given information to
find desired information.
So the process of solving an algebra problem begins with extracting the
given information from the set of facts.
Next, selecting a formula which uses what is given to find what is desired.
Substitution of the given values into the formulas is next. Lastly, the math
is performed to produce the result.
So it is
Many students of these calculations like to go directly from the formula to
the calculator without entering the given information in the formula.
A tip toward more success with calculations is to take the time needed to
enter the given information into the formula before reaching for the calculator.