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OpenStudy (anonymous):
Which ordered triple is a solution to the equations below? 3x+y+z=7 x+3y-z=13 y=2x-1 A) (2,3,-2) B) (2, -3, -20) C) (-2,-5, 18) D) (-2,3,10)
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OpenStudy (anonymous):
just plug in the coordinates into the eqaution you will find the answer
OpenStudy (anonymous):
so the answer is A
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