A
Variable is a letter representing a number. |
x = 32 + x = 2 + 3 = 5 |
x = 82x 4
=416 4=4 |

Addition is the inverse of subtraction and vice versa.

Multiplication is the inverse of division and vice versa.

Example: x + 4 = -12 |
Example: d – 8 = -15 |

Example: -4c = 44 |
Example: F8 =
-4 |

Example: Jack Nickles is behind in a golf tournament. He currently is at – 1. The leader John Weekly is at – 8. What score does Jack need to win the tournament? Write an equation to represent this problem and then solve it. |
The inverse operation is subtraction of – 1 from both sides. j + - 1 – (-1) = -8 – (-1) j = -7 ? Check: -7 + -1 = -8 -8 = -8 |