Answer:
10
Step-by-step explanation:
Fatima wrote down 3 square numbers
since we don't know the three square we will represent it by any variable (X)
3x=30
so you divide both sides by 3
so we have 3x/3=30/3=10
therefore the answer is 10
 
        
             
        
        
        
Hey there!
y-12=20
Add 12 to both sides. (do the inverse of subtraction, which is addition) 
y=32
Check answer. 
32-12=20 <=== checks out :) 
I hope this helps!
~kaikers 
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
Factor out to simplify: 
15d+105=4d-16+11d
15d+105=15d-16
subtract 15d from both sides
105=-16
this means that there are no solutions for d
 
        
             
        
        
        
Answer:
should be 43 
Step-by-step explanation:
because it goes up by 2 every time