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An algebraic expression is a mathematical phrase that can include numbers, operations symbols, and most importantly variables.
Because variables are important elements, algebraic expressions are sometimes called variables expressions.
| Mathematical phrase | Algebraic expression |
| Six more than a number | x + 6 |
| The difference of twelve and a number | 12 - x |
| The product of a number and negative 4 | x(-4) |
| A number divided by another number | x/y |
| Twice a number plus three | 2x + 3 |
| Two subtracted from a number | x - 2 |

An algebraic expression does not have an equal (=) sign
For example, x + 8 - y = 12 is not an algebraic expression.