Rules for finding variables

* Remember to move a number you must always do the opposite.

* In order to solve for a variable you must move all other numbers to the opposite side of the equal sign.

EXAMPLE:

4 + n = 7

To solve for n we must first move the 4 by performing the opposite operation. Since there is no sign in front of the 4 it is a positive number and you must subtract in order to find the variable.

EXAMPLE:

n = 7-4

n = 3