book Maths Puzzle Numerical Ability

3-1/2|(1/2)x-4| = 2

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book Other Question

Does anyone know how to simplify this problem?``

(3x-2)(x-4)-(x-4)(6-5x)/(4-x)(8x-1)
(x+1 / 3) + (x+2 / 7) = 2 Solve for X