Answer:
Perhaps -33
Step-by-step explanation:
I'm not sure I understand "4a a-5b, in a = 12 and b = 9"
What does 4a a-5b mean?
If the question is to find the value of a - 5b when a=12 and b=9, then:
a-5b
12 - 5*9
12 - 45
-33
