Kulay, there is no such thing as a "step by step answer" here.  You seem to want a "step by step solution."
I must assume that by 4/5 you actually meant (4/5) and that by 2/3 you meant (2/3).  Then your equation becomes:
(4/5)w - 12 = (2/3)w.  
The LCD here is 5*3, or 15, so mult. every term by 15:
12w - 180 = 10w.   
Add 180 to both sides, obtaining 12 w - 180 + 180 = 10w + 180.     
Then 12w = 10w + 180.  Simplifying, 2w = 180.    What is w?
        
             
        
        
        
Answer:
correct  simulations of Tom’s scenario.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
87/56
Step-by-step explanation:
Simplify the following:
3/56 + 3/2
Put 3/56 + 3/2 over the common denominator 56. 3/56 + 3/2 = 3/56 + (28×3)/56:
3/56 + (28×3)/56
28×3 = 84:
3/56 + 84/56
3/56 + 84/56 = (3 + 84)/56:
(3 + 84)/56
3 + 84 = 87:
Answer:  87/56
 
        
             
        
        
        
A) set x as the number of cameras
18x=9x+1800
9x=1800
x=200
b) i'm assuming it's increasing production from my answer in a, so the profit would be 18(250)-(9*250+1800)=4500-4050=450