Use photo math :) and you will get your answer
        
                    
             
        
        
        
Answer:
I love algebra anyways
The ans is in the picture with the  steps how i got it
(hope this helps can i plz have brainlist :D hehe)
Step-by-step explanation:
 
        
                    
             
        
        
        
I would try Khan Academy.  He does very good explainations
        
             
        
        
        
We can write the system in the following form:
![\left[\begin{array}{cccc}5&-4&4&2\end{array}\right]  \left[\begin{array}{c}x_1\\x_2\\x_3\\x_4\end{array}\right]  =b](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D5%26-4%264%262%5Cend%7Barray%7D%5Cright%5D%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bc%7Dx_1%5C%5Cx_2%5C%5Cx_3%5C%5Cx_4%5Cend%7Barray%7D%5Cright%5D%20%20%3Db)
The above system is equivalent to the following equation:

Of course, the above system has solution for any values of b since there is one equation and four variable, there is infinite number of solution each time. 
 
        
        
        
Even numbers are considered divisible by 2
Prime numbers are numbers divisible by 1 
Considering that in this situation, we only need positive numbers, 2 is the only number. It is even and also prime. 
Therefore prime numbers