Can someone please help me

Answer:
63
Step-by-step explanation:
We can easily solve this problem using algebra as follows.
Let Meteorite B be expressed as x.
We know that the combined weight is 84 tons and that meteorite A is 3 times the weight of meteorite B. That means Meteorite B is x/3.
Based on that, let's form an equation:
[tex]x + \frac{x}{3} =84\\1 \frac{1}{3} x=84\\x=63[/tex]
I hope this will help you :D