\\begin{cases} 8x + 2y = 46 \\\\ 7x + 3y = 47 \\end{cases} not support

[MCChao211]

I found that "\begin{cases} 8x + 2y = 46&\\ 7x + 3y = 47 \end{cases}" can be resolved successfully, But the title string is not support.

[jakubradzik]

you need to add ampersand to both sides of equasion :)