mkldosen mkldosen
  • 25-09-2017
  • Mathematics
contestada

solve the equation
6x-2y+1=0
3x-5y+7=0

Respuesta :

choixongdong
choixongdong choixongdong
  • 25-09-2017
6x-2y+1=0  (1)
3x-5y+7=0 (2)

multiply equation (2) by negative 2 (-2)
3x-5y+7=0 (2) will become
-6x + 10y - 14 = 0 

now you have

 6x - 2y + 1=0  
-6x + 10y - 14 = 0 
-----------------------------add
8y - 13 = 0
8y = 13
 y = 13/8
 y = 1.625

substitute y = 1.625 into 6x-2y+1=0 

6x-2y+1=0 
6x-2(1.625)+1=0 
6x - 3.25 + 1 = 0
6x - 2.25
6x = 2.25
  x = 0.375

answer
solution (0.375, 1.625)


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