OK.  Hold on tight.  Here we go.
Remember ... the "solution" is the number that 'g' must be 
in order to make the equation a true statement.
The original equation:   You said that  -2 = g - 9
Now, let's add  9  to each side:             7 = g .
        
                    
             
        
        
        
The probability is 4 out of 14
        
                    
             
        
        
        
Fraction simplified:33/40
Decimal:0.825
Percent:82.5
        
                    
             
        
        
        
Answer:
f(x) = 1/2x
Step-by-step explanation:
When x = -4  the output is -2
We are dividing by 2
When x = -2 the output is -1
f(x) = 1/2 x
Check when x = 2
f(2) = 1/2 (2) =1
 
        
             
        
        
        
Similar triangles so AC:BC=AE:DE
15+6=21 = AE
15:12.5=21:?
to get from 15 to 12.5 you divide by 15 and times by 12.5 so do this the to the other side 
21/15=1.4
1.4 x 12.5=17.5
So DE=17.5