When we solve for a variable in say two linear equations, by what property we are allowed to add one equation to the other or subtract one equation from the other? How can this be allowed when the two are completely different equations?(adsbygoogle = window.adsbygoogle || []).push({});

For more than two equations, does this work for adding/subtracting only two equations? Can more than two equations be simultaneously added/subtracted?

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Why are we allowed to add two or more linear equations when solving for a variable?

Loading...

Similar Threads - allowed more linear | Date |
---|---|

B Sets and functions that gain more structure with context | Jul 7, 2016 |

I Eigen Vectors, Geometric Multiplicities and more... | Apr 10, 2016 |

Computing determinants: Allowed shortcuts? | Apr 19, 2013 |

Is every matrix diagonalizable if we allow complex entries? | Feb 11, 2013 |

**Physics Forums - The Fusion of Science and Community**