exam Maths Puzzle Numerical Ability

please help to solve

2x - y - z = -5

-2x + 2y - z = 5

x + 3y + z = 6

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exam Other Question

A sample of 20 pages was taken without replacement from the 1,591-page fhone directory Ameritech Pages Plus Yellow Pages. On each page, the mean area devoted to display ads was mea Which unit of measure represents volume?

A) m

B) m^2

C) square meters

D) m^3