Evaluate the expression when a=7 and x=-2.

[tex]x-3a[/tex]
Plug in the values a=7 and x=-2
[tex]=-2-3(7)[/tex]
[tex]=-2-21=-23[/tex]
The answer is -23.
Let me know if you need any clarifications, thanks!
Answer:
-23
Step-by-step explanation:
[tex]x - 3a \\ \\ - 2 - 3 \times 7 \\ \\ - 2 - (3 \times 7) \\ \\ - 2 - 21 \\ \\ - (2 + 21) \\ \\ - 23[/tex]
I hope this helps you :)