jaylintorres983383 jaylintorres983383
  • 14-09-2020
  • Mathematics
contestada

-3x + y = 22
-12x – 10y=-10

Respuesta :

unicorn3125
unicorn3125 unicorn3125
  • 14-09-2020

Answer:

              x = -5,  y = 7

Step-by-step explanation:

-3x + y = 22     ⇒  y = 3x + 22

-12x - 10y = -10  and  y = 3x + 22

-12x - 10(3x + 22) = -10

-12x - 30x - 220 = -10

               +220       +220

 - 42x  = 210  

 ÷(-42)     ÷(-42)

    x = -5

y = 3(-5) + 22 = -15 + 22 = 7

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