Ok so lets plug in a first -1/3(-3) would equal 9 a is the accurate  answer
        
                    
             
        
        
        
16:29:15 I think that would be it but, I'm really sorry if that's not right
        
             
        
        
        
Answer:
The answer is 3/4 because 2/4 + 1/4 = 3/4.
 
        
             
        
        
        
Answer:
each notebook costs $2.70
each pack of pencils costs $1.50
Step-by-step explanation:
system of equations:
let p = pack of pencils
let n = notebook
3p + 5n = 18
4p + 4n = 16.8
I used the elimination method by multiplying the first equation by 4 and the second equation by -3
4(3p + 5n = 18)  =  12p + 20n = 72
-3(4p + 4n = 16.8)  =  -12p -12n = -50.4
adding the new equations together you get:  8n = 21.6
n = 21.6/8
n = $2.70
solve for 'p':
3p + 5(2.7) = 18
3p + 13.5 = 18
3p = 4.5
p = $1.50