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There is no variable, only a fixed number.
4
you CAN have a variable as an exponent.For example, look at the equation 2x =4. We know x=2
t=-4
The value of a variable is called the solution. You can determine if the solution is correct by solving for the variable by using the Distributive Property, and Inverse Operation. For an example: If x = 8, determine if it is a solution to 1x - 4 = 4 Replace x with 8. 1(8) - 4 = 4 1 * 8 = 8 8 - 4 = 4 4 = 4 Yes. 8 is a solution to the equation