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N76 [4]
3 years ago
14

Solve the system using elimination. x − 4y = 4 and -3x − 4y = 12

Mathematics
1 answer:
olya-2409 [2.1K]3 years ago
6 0

  x - 4y = 4

-3x - 4y = 12

Subtract the first equation from the second

  x - 4y = 4

-4x      = 12

Divide the second equation by (-4)

  x - 4y = 4

  x      =  -3

Subtract the second equation from the first

   - 4y  =  7

  x      =  -3          

Divide the first equation by (-4)    

       y  =  -7/4

  x      =  -3        

<h3>So, the solution is  x = -3  and  y = - 7/4</h3>

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