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Linear Algebra
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OpenStudy (anonymous):
Solve the linear system. x + y = -3. y = 2x. A) (-1, -2) B) no solution C) coincident
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OpenStudy (doc.brown):
There is a good clue in the second formula y = 2x as it states what y is. The y can be substituted for something equal to y in the first formula: x + y = -3 x + 2x = -3 Does that help?
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