Question: 3 x + 2 y + 7 z =38 9 x + 6 y + 21 z =114 0.6 x + 0.4 y + 1.4

3x+ 2y+ 7z=38

9x+ 6y+ 21z=114

0.6x+ 0.4y+ 1.4z=7.6

Select one:

a.{(x,y,z) |3x+ 2y+ 7z=38}

b.{(-1,-4,7})

c.{(1,4,-7)}

d.{ }

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