Answer:
500,000
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
no solution
Step-by-step explanation:
y-8=y-9
y=y-1
error
 
        
             
        
        
        
Answer: 15º and 50º
Explanation:
The angles in a triangle add up to 180. 
180 - 115 = 65
3x + 10x = 13x
13x = 65
x = 5
3x = 15
10x = 50
 
        
             
        
        
        
Answer:
x = 6
y = -6
Step-by-step explanation:
x + y = 0 (Multiply by -1)
x + 9y= -48
-x - y = 0
x + 9y= -48
8y = -48
y = -6
x + y = 0
x - 6 = 0
x = 6