Evaluate. Write in simplest form.

Question

6-b/3a

a=10
a=-9

My answer is 2 or 5...I'm not sure

Answer 1

Does b = -9?

6-b/3a

(6 + 9) / (3/10)

15 / (3/10)

15 * (10/3) = 50

Answer 2

Yes b= -9