- - Simultaneous equation variables
- - Unknowns in algebra
- - Things to solve for, in some equations
- - Simultaneous equation unknowns
- - Algebraic unknowns
- - 2005 Coldplay album with the single "Speed of Sound"
- - Familiar axes
- - Standard graph axes
- - Common graph axes
- - Axes in a geometry class
- - Dual variables
- - 2005 Coldplay album
- - 2005 #1 album for Coldplay
- - Plane axes
- - Standard axes
- - Two-dimensional axes
- - Male chromosome makeup
- - The algebraic mysteries.
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