By, Mrs. Muller

 Recall the following properties when solving these types of equations:  Addition property of equality: a=b, then a+c=b+c, or 2x3=6, then 2x3+4=6+4  Identity Property of Addition: 6+0=6, or a+0=a  Inverse Property of Addition: 6+-6=0, -6+6=0 or –a+a=0, a+-a=0

 Remember just like with solving addition equations, we want to keep the equation balanced when isolating (getting alone) the variable.  Which means whatever we do to one side of the equation we must do to the other side of the equation as if we were balancing a scale.  For example Solve  C-12= C+0=55 C=55 Isolate the variable by using the addition Property of Equality Inverse Property of Addition Identity Property of Addition