Question

1. 1 — - — 3х+y. 3х-у

Answer 1

Вот так как-то))) решил через Photomath

Answer 2

It seems like you've provided an expression that includes mathematical operations. However, your input is a bit unclear. Are you looking for an explanation of the expression "1 — - — 3х+y. 3х-у"?

Please provide more context or clarify the expression so I can assist you better. It seems like there might be some formatting issues in your input as well. If you could rephrase or provide more details, I'd be happy to help!