exam Maths Puzzle Numerical Ability

what are the rules for solving inequalities? Please tell me.

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exam Other Question

Is the following statement true or false and why?

Three noncollinear points determine two lines.
I have 24 questions the first question is solve the system of equation by graphing then classify the system

1. x+y=8
x-y=-6

2. 4x-y=27
4x+5y=-15

3. 7u+v=4