It is a.1
(1+5) - 2(4(1)-1) = 0 
(6) - 2(3) = 0
6 - 6 = 0 
0=0
        
             
        
        
        
Answer:
a) x = -10
b) x = 7
Step-by-step explanation:
a)
2(x + 3) = x - 4
2x + 6 = x - 4
2x - x = -4 - 6
x = -10
b)
4(5x - 2) = 2(9x + 3)
20x - 8 = 18x + 6
20x - 18x = 6 + 8
2x = 14
x = 7
 
        
                    
             
        
        
        
Answer:
1 yard = 3 feet
Step-by-step explanation:
1 yard = 3 feet
 
        
             
        
        
        
15x, because 2 × 4x= 8x and -1×-7=7x...add 8x and 7x ull get the answer