exam Maths Puzzle Numerical Ability

Solve the system using Gaussian elimination
2x+z=-14
x+2y-3z=1
2x-y-z=-3

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exam Other Question

Find the coordinate of the image of point (5, 7) translated down 5 units. A map has a scale of 1 centimeter : 8 Kilometers.Use the given actual distance to find the distance on the map.

30. 4 km

Any help with this equation would be Greatly</b> appreciated.No answers from solver91311 please :)