vrushilkachhia vrushilkachhia
  • 06-11-2019
  • Mathematics
contestada

Solve through substitution

–3x–8y=20

y=5x+19

Point of intersection, please

Respuesta :

onegamer onegamer
  • 06-11-2019

Answer:

(-4, -1)

Step-by-step explanation:

-3x - 8y = 20; y = 5x + 19

y = 5x + 19; -3x - 8y = 20

y = 5x + 19

-3x - 8y = 20

-3x - 8(5x + 19) = 20

-43x - 152 = 20

-43x - 152 + 152 = 20 + 152

-43x = 172

-43x / -43 = 172 / -43

x = -4

y = 5x + 19

y = (5)(-4) + 19

y = -1

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