7x - 7x = 0
-2 + 6 = 4
So, the answer is 4. 
        
             
        
        
        
Answer:
I think that you need to add obvoiusly.
12351 Thats what I got. But Im not sure if its correct. I hope his helps
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
x = -2 and y = 3
Step-by-step explanation:
It is given that,
4x + 5y = 7    -----(1)
3x – 2y = –12   ----(2)
<u>To find the value of x and y</u>
eq(1) * 3 ⇒
12x + 15y = 21   ----(3)
eq(2) * 4 ⇒
12x - 8y = -48  ---(4)
eq(3) - eq(4) ⇒
12x + 15y = 21   ----(3)
<u>12x - 8y = -48 </u> ---(4)
  0 + 23y = 69
y = 69/23 = 3
Substitute the value of y in eq(1)
4x + 5y = 7    ----(1)
4x + 5*3 = 7
4x = 7 - 15 = -8
x = -8/4 = -2
Therefore x = -2 and y = 3
 
        
             
        
        
        
Answer:
They bought 5
Step-by-step explanation:
65x+40y=765
65(5)+40(11)=765
 
        
             
        
        
        
Answer:
Definition of Midpoint
Step-by-step explanation:
Since T is the midpoint then it is equadistant from R to T and T to S