Answer:
Charlie's solution is incorrect.
Part A: The equation must be divided by the number next to the variable. So 5x will be divided by 5 which will equal x, and 30 will be divided by 5 which equals 6. The final answer will be x=6. 
Part B: The equation will have one solution because there is only one way to solve it. 
 
        
             
        
        
        
Answer:
x-7 25
25
Step-by-step explanation:
 
        
                    
             
        
        
        
3(-12)-17= 3 times -12 is -36 
-36-17= -53
        
                    
             
        
        
        
The answer is 33. Remember all complimentary angles equal 90 degrees so subtract 90 from 57 and the other angle is 33
        
             
        
        
        
Answer:
   x = 5
Step-by-step explanation:
The table and a graph of f(x) and g(x) are shown in the attachment. The solution is x=5. The table shows you f(5) = g(5) = 2, as does the graph.
It is generally convenient to make use of a graphing calculator or spreadsheet when repeated evaluation of a function is required.