Answer:
9, or -9
Step-by-step explanation:
9t=81 or -81
t=9 or -9
[tex]t=9\\t=-9[/tex]
[tex]|9t|=81[/tex]
[tex]9t=81\\9t=-81[/tex]
[tex]t=81 \div 9\\t=-81 \div 9[/tex]
