Answer:
If x = 3y and 3y = x, then y = 1/3x.
 
        
             
        
        
        
Theres only 4 but the answer is -15
        
                    
             
        
        
        
Answer and explanation:
Please find attached answer and explanation 
 
        
             
        
        
        
3-(2x-5)=-4(x+2)
We simplify the equation to the form, which is simple to understand 
3-(2x-5)=-4(x+2)
Remove unnecessary parentheses
3-2x+5=-4*(x+2)
Reorder the terms in parentheses
3-2x+5=+(-4x-8)
Remove unnecessary parentheses
+3-2x+5=-4x-8
We move all terms containing x to the left and all other terms to the right. 
-2x+4x=-8-3-5
We simplify left and right side of the equation. 
+2x=-16
We divide both sides of the equation by 2 to get x. 
x=-8