book Maths Puzzle Numerical Ability

31x-8(3x-0.745)=6x+0.205 solve

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book Other Question

Calculate the value of (b� - 4ac) in the equation "9x� + 12x + 16 = 0" and state how many real solutions this equation has. What are they? express as a single logarithm: ln7 + 1/2 ln9