PleaseHelpMe1414 PleaseHelpMe1414 Today at 9:52 AM Mathematics Answered In the expression 2x - 8 what is x referred to as? 1. coefficient 2. variable 3. constant Which is NOT an equation? 1. 5 - 4x 2. 6x - 5 = 8 3. x/3 + 9 = -1