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  • 16-12-2021
  • Mathematics
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12x+9y=-4
-3x-10y=-1

Respuesta :

rspill6
rspill6 rspill6
  • 17-12-2021

Answer:

Step-by-step explanation:

12x+9y=-4

-3x-10y=-1

===

12x+9y  =  -4

-12x-40y = -4   [Multiply the second equation by 4 and add to the first]

     -31y  = -8

y = 8/31

y =  0.258

Use this in the 2nd equation to find x:

-3x -10y = -1

-3x -10*(8/31) = -1

-3x -(80/31) = -1

x = ((80/31) - 1)/-3

x = -0.527

The intersect (solution) is at point (-0.527,0.258)

See attachment.

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