| Answer | Crossword Clue |
|---|---|
| VAR | X, in an equation: Abbr. |
| VALUE | "x" in an equation |
| VARIABLE | X or Y, in an equation |
| unknowns | symbol (as x, y, or z) in a mathematical equation representing an unknown quantity |
| identities | The equality of two expressions for all values of the quantities expressed by letters, or an equation expressing this, e.g., (x + 1)2 = x2 + 2x + 1 |
| identity | The equality of two expressions for all values of the quantities expressed by letters, or an equation expressing this, e.g., (x + 1)2 = x2 + 2x + 1 |
