Absolute!

Algebra Level 1

True or False?

For any three real numbers (x,y,z),(x, y, z), x+y+zxy+z+x+yz+x+y+z. |x|+|y|+|z|\leq |x-y+z|+|x+y-z|+|-x+y+z|.


Notation: | \cdot | denotes the absolute value function.

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