Ashley2313 Ashley2313

03-02-2015
Mathematics

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-3-y=24
y=3x solving systems of equations by substitution

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03-02-2015

{ - 3 - y = 24 ⇒ - y = 24 + 3 .(-1) ⇒ y = - 24 - 3 ⇒ y = - 27
{ y = 3x

y = 3x
( - 27 ) = 3x
- 27 = 3x
- 27 = x
3
- 9 = x

S = { - 9 , - 27 }

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