The equation is 2x+6=x-7
then we solve it, 2x-x=-7-6
so x=-13
        
             
        
        
        
Answer:
(7;2)
Step-by-step explanation:

 
        
             
        
        
        
Answer:
20%
Step-by-step explanation:
To find the percent decrease, we do old number subtracted from the new numbers over old. 
We do
40 - 32 = 8
Then we put the 8 over the old and get
8/40
In percentage form it would be 20%
 
        
             
        
        
        
2/X^2=4/X+1                                   times by both denominators
2(x+1)=4(x^2)
2x+2=4x^2
4x^2-2x-2=0
(2x+1)(2x-2)=0
x=2x+1 or 2x-2
x=-1/2 or 1