# Balance when Adding and Subtracting

*Algebra is great fun - you get to solve puzzles!*

When we add or subtract the same thing from both sides the equation **stays in balance**.

Watch the equation below. Use the +x, −x, +1, −1 buttons. Try to get "x = (something)"

## Things to try

Each "equation" will have a solution like "x=2" (or maybe "x=3", etc). Try to see all the different ways this answer can be hidden.

First, try to solve the equation by adding and subtracting until you get an answer like x = (value) | |

Then add and subtract some more until you get x - (value) = 0 | |

Then try to get a solution like - (value) = -x | |

Then just add and subtract different amounts to see all the possibilities. | |

Now press "New Equation" and try out some more ... ! |