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# Grade 7 Chapter 1

### Principles of Algebra

Question | Answer |
---|---|

absolute value | The distance of a number from zero on a number line. |

additive inverse | The opposite of a number. |

algebraic expression | An expression that contains at least one variable. |

algebraic inequality | An inequality that contains at least one variable. |

coefficient | The number that is multiplied by the variable in an algebraic expression. |

constant | A value that does not change. |

equation | A mathematical sentence that shows the two expressions are equivalent. |

evaluate | To find the value of a numerical or algebraic expression. |

inequality | A mathematical sentence that shows the relationship between quantities that are not equivalent. |

integer | The set of whole numbers and their opposites. |

inverse operation | Operations that undo each other: addition and subtraction, or multiplication and division. |

opposite | Two numbers that are an equal distance from zero on a number line; also called additive inverse. |

solution set | The set of values that make a statement true. |

substitute | To replace a variable with a number or another expression in an algebraic expression. |

variable | A symbol used to represent a quantity that can change. |

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bookannelid