brenda2398 brenda2398
  • 18-09-2019
  • Mathematics
contestada

-4x + y = 9
- 4x +9y= 17
Solve by elimination

Respuesta :

lolmandude45
lolmandude45 lolmandude45
  • 18-09-2019

Answer:

(x , y) = (-2 , 1)

Step-by-step explanation:

multiply both sides by -1

sum the equations vertically to eliminate at least one variable

divide both sides by -8

substitute the value of y into the equation

now solve  for x using that y=1

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