Answer: 
x = 2
2x + 1 = -x +7           Add and subtract 
3x = 6                                divide
x = 2
        
             
        
        
        
Answer:
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x = 5
Step-by-step explanation:
We have: The sum of the measures of angle M and angle R is 90°
M + R = 90°    
 M = (5x + 10)°
Plug M into (1)
the equation: (5x + 10)° + R = 90°   (2)
 R=55° into (2)
 (5x + 10)° + 55° = 90°
5x + 10 + 55 = 90
  5x + 65 = 90
 5x = 25
x = 5
  
        
             
        
        
        
Answer:
its b lol
Step-by-step explanation: