bcotto9129 bcotto9129
  • 08-04-2022
  • Mathematics
contestada

y=3x-7
-4x+5y=20
solve algebraically

Respuesta :

TillyMatilda
TillyMatilda TillyMatilda
  • 08-04-2022

Answer:

so x=5 and y= 8

Step-by-step explanation:

[tex]y = 3x - 7 \: \\ 20 = - 4x +5y \\ 20 = - 4x + 5(3x - 7) \\ 20 = - 4x + 15x - 35 \\ 20 + 35 = 11x \\ 55 = 11x \\ x = 5 \\ now \: you \: put \: x = 5 \: into \: the first \: equation \: \\ 5 \\ y = 3(5) - 7 \\ y = 8[/tex]

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