If x, y and z are real numbers such that 4x + 2y + z = 31 and 2x + 4y – z = 19, then the value of 9x + 7y + z = ______.

1
cannot be computed from the given information
2
\(\frac{{281}}{3}\)
3
\(\frac{{182}}{3}\)
4
\(\frac{{218}}{3}\)

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