exam Maths Puzzle Numerical Ability

what do you call a polygon with no equal sides?

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exam Other Question

what is the answer to this problem using the cramer's rule?

x + 2y - z = -4
2x - 3y + 5z = 27
5x - y + 4z = 27 4. Solve
x + y - z = 0
2x - y + z = 6
-x + y + z = 8
Show your answers as (x,y,z)

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