User talk:Er meer

March 2020
Hello, I'm Thepenguin9. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to System of linear equations—because it did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help desk. Thanks.  Thepenguin9 (talk''') 18:33, 10 March 2020 (UTC)

Please refrain from making unconstructive edits to Wikipedia, as you did at System of linear equations. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism may result in the loss of editing privileges. Thank you. — Anita5192 (talk) 18:39, 10 March 2020 (UTC)