Write an example of an algebraic expressions that always has the same value regardless of the value of the variable. need with hw

For the algebraic expressions to have the same value regardless of the value of the variable, let the variable appear in both the numerator and the denominator. Example, 
                                       78x / 13x = 6
We can cancel the x's from both the numerator and denominator and the expression becomes, 6 = 6.