exam Maths Puzzle Numerical Ability

Y-2X=0 Get ordered pairs to Graph

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exam Other Question

14 15
_______ + ________
15-x x-15
_______________________ OR ((14)/(15-x)+(15)/(x-15))/((8)/(x)+(7)/(x-15))
8 7
_____ + ____
can someone please help me with this problem?

4 x + 5
____________ + ________

x^2 + 2x - 3 x + 3