8 is the answer to your question
Answer:
always
Step-by-step explanation:
Global warming, over population, littering, and many more
Since both A and B are squared they can be added normally. So A+B would be
(5x^2)+(-3x^2+6) = 2x^2+6.
3x+9=36
with 2 times 9kg and 18kg is the solution:
I:2x+y=36
II:y=x+9
if you substitute y of II into I:
3x+9=36
3x=27
x=9
-> 2 boxes with 9kg and 1 with 9+9=18 kg
2*9+18=36kg in total
so the third option/Rashid is the solution