exam Maths Puzzle Numerical Ability

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If 2x-4y=-2 and 3x-2y=3 then 2y+x =

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For the equation x - --x = 0, how do I solve for all values of x that satisfies the equation? i need help on this equasion: 8 to the power of 2/3 times 8 to the power of 1/3