How many solutions are there to the equation x = x + 1?
Answer
There are no real number solutions, since x is never equal to itself plus one. Would you ever bring yourself as a "plus one" to a wedding?
How many solutions are there to the equation w + 3 = 7?
There's one solution: w = 4 works, and it's the only value of w that does.
How many solutions are there to the equation 2x = x?
There's one solution. The only number that equals itself when doubled is 0.
How many solutions are there to the equation x4 = 1?
There are two real-number solutions: x can be 1 or -1.
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