book Maths Puzzle Numerical Ability

Solve x+3=|2x|by graphing f(x)= x+3 and g(x)= |2x|.

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book Other Question

Find (a)the directix,(b)the focus and (c)the roots of the parabola y=x^2-5x+4 Find three consecutive odd integers such that the sum of the second and third integers is three less than three times the first integer.