Answer: its c In step 3, he should have divided both sides by  StartFraction 6 Over 4 Endfraction.
Step-by-step explanation:
 
        
             
        
        
        
Answer
a= -6
Step-by-step explanation:
-2(a-3)=12
1.) -2(a)= -2a
2) -2(-3)= 6
3)  -2a+6=12
           -6    -6
4) -2a/-2 = 12/-2
a = -6
 
        
             
        
        
        
So lets write this equation out.  Let x be that number we are trying to find. 
So five-sevenths is a fraction that is written like this 
5/7 
when you see the word "of" that means multiplication 
so we can write the full equation. 
(5/7)x = -35 
now we can solve 
Multiply both sides by 7 
5x = -245
now divide by 5 
and we get 
x = -49
        
             
        
        
        
Answer:
-11/12
Step-by-step explanation:
→ Find change in y
-7 --18 = 11
→ Find change in x
-1 - 11 = -12
→ Divide each other
-11/12