Answer:
-7n=73-10
-7n=63
n=-63/7
[tex]10 - 7n = 73 \\ - 7n = 73 - 10 \\ - 7n = 63 \\ 7n = - 63 \\ n = \frac{ - 63}{7} \\ \boxed{ n = - 9}[/tex]
