Answer:

Step-by-step explanation:
Given
(5x - 3y)² = 0, then
5x - 3y = 0 ( add 3y to both sides )
5x = 3y (divide both sides by 5 )
x =  y ( divide both sides by y )
 y ( divide both sides by y )
 =
 = 
 
        
                    
             
        
        
        
Im not sure what your asking
        
             
        
        
        
r-12
substitute in r=7
so 7-12 = -5
 
        
                    
             
        
        
        
Answer:
you just need to devide by 2 the second equation 
Step-by-step explanation:
- -x + y = 2 (you leave it as it is)
- 2x + 4y =32 => 2x/2 +4y/2 = 32/2 
 => x + 2y =16
we can devide or multiply in an equation by any number we want, as long as we do it to every term.
 
        
                    
             
        
        
        
Answer:
14
Step-by-step explanation:
Convert the fraction into a decimal
1/2 = 0.5
Divide
7/0.5 = 14