Answer:
5f+6g+12
Step-by-step explanation:
Combine like terms
10f-5f = 5f
6g
8+4 = 12
5f+6g+12
 
        
                    
             
        
        
        
X+30+70=180
x+100=180. -100 both sides
x=80
|x=80° |
        
             
        
        
        
Answer:
-3
Step-by-step explanation:
Since x=1, we can simplify the equation to 9+7y=-12.
To find the value of 7y, we first have to find what is missing.
-12-9=-21, so 7y has to be equal to -21. -21/7 equals -3, so y=-3.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
(x-3)² - 7 = (5-3)²-7
          = 2²-7
           = 4 - 7
           =  -3