Answer:
45 hihihihihihihihihihihihih
Step-by-step explanation:
Find Total weight at left side

Now
Per block weight at right side

Answer:
37
Step-by-step explanation:
??!?!?!?!?!?! don't know what'cha mean
-1 1, -2 2, 3 -3. Is this what you wanted? If no tell me in comments and maybe a can help fix.
Answer:
2400sq ft
Step-by-step explanation:
20×2 and 30×2
40×60
2400 sq ft