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What is the solution to the system of equations shown below?

2x + 5y + 3z = 10
3x ­ - y + 4z = 8
5x - ­ 2y + 7z = 12

a) (7, 1, ­-3)
b) (7, ­-1, ­-3)
c) (7, 1, 3)
d) (­-7, 1, -­3)

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