I can maybe help, what's the question
        
             
        
        
        
Answer:
x=3
Step-by-step explanation:
f(x) = 2^x
Let f(x) =8
8 = 2^x
Rewriting 8 as 2^3
2^3 = 2^x
The bases are the same so the exponents are the same
3=x
 
        
                    
             
        
        
        
Answer: 300
Step-by-step explanation: 300+200=500
then 500-200=300
 
        
                    
             
        
        
        
Answer:
(x,y) = (0,0)
Step-by-step explanation:
 Let both as equation (1) and (2) 
put equal both sides -x = -7x 
-x + 7x = 0
6x = 0 
x = 0 
put it in 2nd equation 
y = -7(0)
 y = 0