saintsfan2004
saintsfan2004 saintsfan2004
  • 10-10-2018
  • Mathematics
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gmany
gmany gmany
  • 10-10-2018

Substitute y = x - 4 to the first equation:

-3x + 4(x - 4) = -20     use disrtibutive property

-3x + (4)(x) + (4)(-4) = -20

-3x + 4x - 16 = -20     add 16 to both sides

x = -4

Substitute the value of x yo the equation y = x - 4:

y = -4 - 4 = -8

Answer: (-4, -8)

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