A move decimal behind the 7 ten places to the right since its positive
        
             
        
        
        
4b-3 .. you use distributive property and multiply 3*b-1 then you have 7b-3b-3 then you combine like terms and subtract 3b from 7b and get 4b-3
        
                    
             
        
        
        
Answer:
C im pretty sure dont report me tho
Step-by-step explanation:
 
        
             
        
        
        
Answer:
system 4.
Step-by-step explanation:
3x+6y=9
multiply by 2
6x+12y=18   ....(1)
-2x+-4y=4
multiply by 3
-6x-12y=12   ...(2)
add (1) and (2)
0+0=30 
which is impossible .It has no solutions.
 
        
             
        
        
        
7q² - 28 = 0
     + 28 + 28
       7q² = 28
         7      7
         q² = 4
          q = ±4
          q = 4    or    q = -4
Solution Set: {±4} and {q|q = 4 or q = -4}