The word "but" is misspelled.  See [systemsOfLinearEqutaions/homogeneousSystems/solutionsOfHomogeneousSystems.tex](https://github.com/mooculus/linearAlgebra/blob/c44b47160191410dca78ff113e6e0c5878d4c09f/systemsOfLinearEqutaions/homogeneousSystems/solutionsOfHomogeneousSystems.tex)