exam Maths Puzzle Numerical Ability

Let a,b Є R^# -׀a׀≤a≤׀a׀

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exam Other Question

Solve each of the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
2x+3y=1
5x+3y=16 1. explain why (5,-2) and (-2,5) do not represent the same ordered pair.