Answer:
15
Step-by-step explanation:
5a - 10b = 45
5a - (10×3) = 45
5a - 30 = 45
5a = 45 + 30
5a = 75
a = 15
44
-4
I got it wrong and it showed me the answer.
The last one is the answer.
I think it's the 3rd one
