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Is -x equals -x for all x?

In: Math and Arithmetic, Algebra, Calculus [Edit categories]

Answer:

Yes!

First answer by Mehtamatics. Last edit by Mehtamatics. Contributor trust: 611 [recommend contributor ]. Question popularity: 1 [recommend question].

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Why does x plus x equal x?
It doesn't; it equals 2x. Only if x = 0 does 2x = x.
For what values x does x equals -x?
In normal arithmetic, x = 0
What does X equal when 1 - X equals X?
1-x=x → 2x=1 → x= 1/2 (0.5) the first step is just moving the x to the other side.
X multiplied by x equals 185 what does x equal?
x * x = 185. So x = ±sqrt(185) or ±13.60147051 (8 decimal places)
X plus X equals X What does X equal if it is not 0 or infinity?
X = (-infinity, 0) U (0, infinity) The above is read as X equals negative infinity, comma zero, union, zero comma infinity on an open interval (By the way, this interval is made up of two intervals)....