4 unknowns needs 4 equations. I'll call the unknown numbers a,b,c,d in that order left to right.
4 + a = b 
a + b = c 
b + c = d 
c + d = 67 
let's use substitution to get rid to combine equations and get rid of variables. 
If a + b = c then a = c - b 
4 + (c - b) = b 
4 + c = 2b 
If b + c = d then b = d - c 
4 + c = 2(d - c) 
4 + c = 2d - 2c 
4 + 3c = 2d 
then we have c + d = 67 so c = 67 - d 
4 + 3(67 - d) = 2d 
4 + 201 - 3d = 2d 
205 = 5d 
d = 41 
Should be easy now, subtract backwards. 
67 - 41 = 26 
41 - 26 = 15 
26 - 15 = 11 
15 - 11 = 4 
4, 11, 15, 26, 41, 67 
        
             
        
        
        
Answer:
A,D,E,G=83 B,C,F=97
Step-by-step explanation:
 
        
             
        
        
        
Answer:
b is the answer trust me i know
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x = 35.4
Step-by-step explanation:
Sum of all interior angles in a triangle = 180°
Therefore:
(x + 2)° + (2x + 2)° + (2x - 1)° = 180°
x + 2 + 2x + 2 + 2x - 1 = 180
Collect like terms 
x + 2x + 2x + 2 + 2 - 1 = 180
5x + 3 = 180
Subtract 3 from each side 
5x + 3 - 3 = 180 - 3
5x = 177
Divide both sides by 5
5x/5 = 177/5
x = 35.4