Answer:
1) 2a+4a+10-6= 6a + 4
2) 3x-5x+7-7= -2x 
3) - 15b+10 +10b= -5b + 10
4) - 4d+d-8-6+3b= - 3d - 14 +3b
 
        
                    
             
        
        
        
Answer:
tooo dificult
Step-by-step explanation:
You know that I can't solve this right?
 
        
                    
             
        
        
        
Change X and Z. X is first evening 
Y is second
Z is third evening
 
        
        
        
If you are comparing the triangles the answer is D