christiefouch christiefouch
  • 11-10-2018
  • Mathematics
contestada

Solve the system by the substitution method.

X+Y=-3
Y=-4x

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answermepls30 answermepls30
  • 11-10-2018
find it I cannot find it
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jimrgrant1 jimrgrant1
  • 11-10-2018

x = 1, y = - 4

substitute y = - 4x into the other equation

x - 4x = - 3

- 3x = - 3 ( divide both sides by - 3 )

x = 1

substitute x = 1 into y = - 4x ⇒ y = - 4


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