nevklu
nevklu nevklu
  • 22-10-2020
  • Mathematics
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p l e a s e help me

p l e a s e help me class=

Respuesta :

laurabaumgart laurabaumgart
  • 22-10-2020

Answer:

x=7

y=10

Step-by-step explanation:

I -7x + 4y = -9 | *3

II 5x - 3y = 5   | *4

Ia   -21x + 12y = -27

IIa  20x - 12y =20

IIa + Ia = IIb

IIb -x = -7  |*(-1)

      x=7

x in I

-7*7 + 4y = -9

-49 + 4y = -9   |+49

        4y = 40  |/4

          y =10

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