Solve, using linear combination.

5x + 2y = –4
–3x + 2y = 12

A.

(–2, 3)

B.
(4, 0)

C.

(2, –7)

D.

(0, –2)

Question

Solve, using linear combination.

 

5x + 2y = –4
–3x + 2y = 12

  
 
 

 

 
  

  A. 
 
(–2, 3)
   
   

 

 
  

  B. 
  (4, 0)   
   

 

 
  

  C. 
 
(2, –7)
   
   

 

 
  

  D. 
 
(0, –2)

anonymous · Answer

Multiply one of the equations by -1
-1(5x+2y=-4)
-5x-2y=4
then add the two equations
-5x-2y=4
-3x+2y=12
=
-8x=16
x=-2
then plug into one of the equations( any will do)

5(-2)+2y=-4
-10+2y=-4
2y=6
y=3

A. (-2,3)