On the GED math test you might be required to solve equations and/or translate word problems into equations in order to answer a question. An equation simply involves an algebraic term or expression on either side of an equals sign (=). For example:
n – 7 = 3
Naturally the values to the left of the = and to the right of the = are equal to each other. In this kind of situation you will often be required to state the value of n. The way you do this is to simply have n all by itself on one side of the equals sign, so you need to get rid of everything next to n. In this example – 7 is what is next to n. You have to move it to the other side of the equals sign. To do that do the opposite of minus 7, which is plus 7 to both sides of the equation:
The sevens cancel each other out, leaving n alone on one side of the equation as we wanted. Seven and three add up to ten so we now know that n is 10.
Again, to move something from one side of the equation to the other you will have to do the opposite operation, as we added to get rid of a minus in the example above. If it was n ÷ 7 = 10 then you would have to multiply both sides by 7 in order to solve for n. The table below lists the operation you need to perform in order to remove a term from an equation.