dss354201
dss354201 dss354201
  • 04-06-2020
  • Mathematics
contestada

how would you change x + 3y = 18 -3x - 12y = -75 to eliminate y

Respuesta :

tramserran
tramserran tramserran
  • 05-06-2020

Answer:  [tex]\bold{y=-\dfrac{1}{3}x+6}[/tex]

                [tex]\bold{y=-\dfrac{1}{4}x+\dfrac{25}{4}}[/tex]

Step-by-step explanation:

  x + 3y = 18

- x           -x

        3y = -x + 18

      ÷3     ÷3 ÷3

         y = (-1/3)x + 6

-3x - 12y = -75

+3x           +3x

        -12y = 3x - 75

       ÷-12    ÷-12 ÷-12

           y = (-1/4)x + (25/4)

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