Here’s my work to your question!
 
        
        
        
Step-by-step explanation:
x+13÷2×2=4×2
x+13=8
x+13-13=8-13
x=8-13
x=-5
 
        
                    
             
        
        
        
Answer:
x = 3
y = 5
Step-by-step explanation:
Using theorem of similar triangles, we have,
(6 + x)/6 = (7 + 3.5)/7
(6 + x)/6 = 10.5/7
Cross multiply
7(6 + x) = 10.5(6)
42 + 7x = 63
7x = 63 - 42
7x = 21
x = 21/7
x = 3
Thus:
7.5/y = (7 + 3.5)/7
7.5/y = 10.5/7
Cross multiply
7.5*7 = 10.5*y
52.5 = 10.5*y
Divide both sides by 10.5
52.5/10.5 = y
y = 5
 
        
             
        
        
        
Answer:
v=2
Step-by-step explanation:
 -9v-9=-27
add nine to both sides
-9v-9+9=-27+9
simplify
-9v=-18
divide both sides by -9
-9v/-9   -18/-9
simplify y=2 
hope this helps :) have a nice day !!
 
        
                    
             
        
        
        
Answer:
200%
Step-by-step explanation:
12 as a whole would be 100%. if you wanted to get to 24 (which would be double) you'd need to double the percentage! hope this helps