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

Which ordered pair is the solution of the following system of equations?
(
( 2x+ 3y = 7
( x+ y = 3
( Please help me with this one.

Find the equation of the axis of symmetry, the coordinates of the vertex, and the coordinates of the x-intercepts, if they exist, for each parabola.

1. f(x)=2x^-3x-14

Thanks very much in advance