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23 January, 11:00

4x + 4y + 2z = 8

x - y - z = 0

4y - 2z = - 15

x = 2, y = - 2, z = 4; (2, - 2,4)

Is (2,-2,4) a solution of the system of equations? Yes or no?

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Answers (1)
  1. 23 January, 11:30
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    The answer is no, because the first two equations are right but the third equation equals - 16 instead of - 15. So the answer is no (2,-2,4) is not the solution to all the system of equations.
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