Respuesta :
Divide EACH SIDE of the equation by 3 .
At that point, I always say
"Step quickly to one side, you you won't get hit
when the answer jumps up at you off of the page."
3a = 16.5
Divide both sides by 3
3a/3 = 16.5/3
a= 5.5
If you want to check the answer just replaced A by 5.5
3(5.5) = 16.5
16.5 = 16.5
The answer is good
I hope that's help , if not I am sorry
If you have questions just let me know