exam Maths Puzzle Numerical Ability

49m2-9=0

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exam Other Question

Could you please help me solve and understand this equation?

Find an equation of the line containing the given pairs of points
(4,3) and (12,7) Y=
please help to graph on a number line :

x + 4 < or equal to 2 or x - 4 is NOT < or equal to -1, d = reals