7/8(x-1/2)=-49/80
70/80(x-40/80)=-49/80     make all common denominator
x-40/80=-56/80                  divide -49/80 by 70/80 to isolate parentheses
x=16/80 or 1/5                   add 40/80 to isolate x
I'm not sure if my answer right because I was rushing but if you follow what I wrote next to the lines you should get the right answer
        
             
        
        
        
Answer:
test? :/
Step-by-step explanation:
 
        
             
        
        
        
Try grouping in paires
4x^3 + 28x^2 + 7x + 49
= 4x^2(x + 7) + 7(x + 7)  - note  that (x + 7) is common to the 2 parts, so
=  (4x^2 + 7)(x + 7)
        
                    
             
        
        
        
Answer: 
y=-2x+4
Explanation:
Subtract 6x from both sides of the equation. 
3y=12−6x
Divide each term by 3 and simplify.
Divide each term in 3y=12−6x by 3.
Cancel the common factor of 3.
Simplify