exam Maths Puzzle Numerical Ability

can you please help me solve by additon-or-subtraction method: (((2x+y=18 2x-y=22)))

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exam Other Question

E (0,7) A (5,-5) T (10,7)

distance?
find the horizontal and verticle asymptotes for the function

g(x)=2x^2/3x^2-1