Answer is 
x > 5
Tell me if it helps
        
             
        
        
        
Answer:
Kindly check explanation 
5 years from now, Johnathan will be (5 + 4) = 9 years 
Step-by-step explanation:
Let Belinda's age = x
Jonathan's age =1/3 x
In 12 years, Belinda will be m years old :
Belinda's age now = x
Jonathan's age 5 years from now, if m = 36
Belinda's age in 12 years, Belinda's age = m
x + 12 = 36
x = 36 - 12
x = 24 years 
Hence Belinda's age now is 24
Jonathan's age now is (1/3) * 12 = 4 years
Hence, 5 years from now, Johnathan will be (5 + 4) = 9 years 
 
        
             
        
        
        
So what you do is subtract 4b on both sides so it will be -ax=9+4b then divide x on both sides and you have your answer 
        
                    
             
        
        
        
No, it is not. Because it doesn't satisfy the first equation.