book Maths Puzzle Numerical Ability

What are the properties of real numbers

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3x + 7y = 1
x + 2y = 1

A) solution = (4,9) B) solution = (5,-2)
C) solution = (1,1/2) D) solution = (1/3 , 1/7)</PRE> WHAT ABOUT THIS 6X-2>-4X+6 HOW SHOULD I WORK THIS?