Answer:
34
Step-by-step explanation:
90-56=34
 
        
                    
             
        
        
        
The answer is -6 
So you need to drop the word sum on -6
        
                    
             
        
        
        
Answer:
X=2
Step-by-step explanation:
-2+6x=12-x
add 2 to both sides 
6x=14-x
now add 1x to both sides
7x=14
and finally divide both sides by 7 so you x is left alone
<h2>
x=2</h2>