SUPER URGENT!!!!!!!! I NEED HELP!!!!!1 PLSSSS!!!!!Use the linear combination method to solve the system of equations. Explain ea
ch step of your solution. 3x-8y=7" " " " x+2y=-7
       
      
                
     
    
    
    
    
    1 answer:
            
              
              
                
                
Answer:
x=-3,y=-2
Step-by-step explanation:
Given 2 expressions
S1:
S2:
Write one equation in terms of any variable (x or y)
Here I am writing S1 in terms of y

Substitute this value of y as the value of y in S2
⇒
Therefore 
Substitute this value of x in any of the expressions S1 or S2
Here i am substituting in S2
⇒
Therefore x=-3 and y=-2
 
                                
             
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Answer:
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Answer:
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Answer:
k = -14
Step-by-step explanation:
We should cross-multiply
9/(k -  7)  =  6 / k
9*k  = 6 * (k - 7)
9k = 6k  - 42
9k - 6k = -42
3k = -42
k = -14