book Maths Puzzle Numerical Ability

need help solving for x: x-4/x-3 + 4 = 3x/x

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Could someone please help explain to me how to figue this problem?

h(x) = -3x^2
I need to state the domain and range of this quadratic function as well as its solution set in interval notation. Any ideas? The Tour de France included 20 parts of vaarious lengths for a total of 3453 km. Stage 17 ran from Vrive-la-Gaillarde to Montlucon at a length of 194 km. If at one point the winn