


SubstitutionIf the value for only one of the variables is givenLook over the problem below. b = 3 As you can see, the expression has two variables b and c, but in this problem, only the value for b is given. Don't panic! Simply substitute the variable b with the number 3, don't worry about doing anything with the variable c. 5(3)  2c + c / (3) Then simplify as much as you can using the Order of Operations: If the value for one of the variables is not a numberIn this case, as in the problem below, you must substitute the variable with the expression given. b = c + 1 NOTEThis problem is one instance where it is absolutely necessary to enclose the expression or number that you are substituting a variable for in parentheses. Because of the Order of Operations 5(c + 1) is not the same as 5c + 1.Substitute: 5(c + 1)  2c + c / (c + 1) Simplify: 5c + 5  2c + c / (c + 1) Proceed to the next page for more substitution resources. 

