3k=7Q+6p
Solve for P which means we have to make 'p' alone

 
        
                    
             
        
        
        
Answer:
y = -2
Step-by-step explanation:
 27 = 17 - 5y
27-17=17-5y-17
10=-5y
10/-5=-5y/-5
-2=y
 
        
                    
             
        
        
        
Answer:
Therefore the Final Solution is
x = 1 and y = 1
Step-by-step explanation:
Given:
 ...............Equation ( 1 )
                ...............Equation ( 1 )
 ................Equation ( 2 )
         ................Equation ( 2 )
To Find:
x = ?
y = ?
Solution:
Equating Equation  ( 1 ) in Equation ( 2 ) we get

Now Substituting y = 1 in Equation ( 1 ) we get

Therefore the Final Solution is
x = 1 and y = 1 
 
        
             
        
        
        
14000+7x=35x (x being the number of books) solve for x and you have your answer. 14000=35x-7x=28x therefore x=14000/28=500 so he needs to sell 500 books before he breaks even.