book Maths Puzzle Numerical Ability

1/x-4 - 3/x square-16 + 2/2x+8

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Please Help! a)Graph 4x+3y=12 b)Give the intercepts c)Give the slope a passenger train travels at 60mi/h and a freight train travels at 40mi/h. It takes the passenger train 1.5h less time to cover the same distance as the freight train. How long d